Malicious PDF — malware analysis report

Static analysis result for SHA-256 36010065f9f6a39d…

MALICIOUS

PDF

90.8 KB Created: 2021-07-07 16:04:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: d5c14251ce85d0f8427e2c4a5bf13a23 SHA-1: e5ada408529e9ab6dd9935ced63c6564fc0d740c SHA-256: 36010065f9f6a39df4621c4a0b08038cefaf678d5fa5d4a69779761d58c12214
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF contains embedded JavaScript and numerous external URIs, many pointing to compromised WordPress sites and disposable IP addresses, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1608572ab4f09b---36737541114.pdf PDF link annotation
    • http://siripanyalamphun.com/user_img/files/sireruj.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bcfd83b85b---menalemawemukadisimogax.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/s5lopndnv70v94o12i0179leh0/40765743337.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/d3b5ec9a8add460dd6f9f5ddf00af7c2/gogigolezofobusi.pdfIn PDF document text
    • http://odnoklassniki-files.ru/images/uploads/files/fuxisenoxolixuputaga.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6abe3a6141---wesomikiw.pdfIn PDF document text
    • https://i-chat.tw/js/ckfinder/userfiles/files/zotomufosuxipo.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/tarava.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/9p53jihfdbp042v9ks23p6rg22/95585947665.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/27c4af53f575be2383125b86725ed224/69456981687.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160702e4240d8e---kipejururiwovewidinokapa.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160739b7caeccf---82756532748.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a74008073b---xonevefuwiwexezoxefetuj.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/sogujiwonuv.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/8fpdaad3bfi607s4v817o8ghf3/xopapizakividij.pdfIn PDF document text
    • https://samtee.com/admin/images/file/24435892071.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/42136310927.pdfIn PDF document text
    • https://hostingpazari.com/calisma2/files/uploads/duxura.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee62a1a783---74857057720.pdfIn PDF document text
    • http://monroehighbeachreunion.com/clients/8/88/88bd109b8fc96949fe6caf7698e88fda/File/92440279151.pdfIn PDF document text
    • https://thefertilizergranulator.com/d/files/zijumurinosumi.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/74b91732b5bb1829b47379c1b8cdebc9/1074331166.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/budejoxuwabovewulipepa.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4263d4556---tulotebozizon.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa36d50f9e5---kekebito.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles//file/nuzawuxup.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160af7c0211d9d---pubutidubizisekexubof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=soft+and+supplePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001011a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11931 10476 bytes
SHA-256: 7c8ccd4ef8b969ba2da2649e3cce9636c5e69ec7e68170ac42cede094ad0c83e
font_02_sfnt_off00013121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13121 17832 bytes
SHA-256: e9b6dab173b901e9209eb7215e01b01b0f8ccebfacb10d13fa7f956b31ce562a

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