Malicious PDF — malware analysis report

Static analysis result for SHA-256 3192d6a8eeb472c1…

MALICIOUS

PDF

121.9 KB Created: 2021-08-12 05:01:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7fe2c4a3091b2ce7c0afecb90131aaf9 SHA-1: e887ca794331a1460994333d2c12005cc4ff7b35 SHA-256: 3192d6a8eeb472c1300c7b4a01a0931ef061f3a2bfd86d157a0b5b0b7b922347
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and a significant number of external links, many pointing to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://garglob.ru/uplcv?utm_term=que+significa+la+palabra+penalista PDF link annotation
    • http://nitm.ac.in/nitmeghalaya/ckfinder/userfiles/files/puxamibivemab.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086ac5ae91d6---89001874610.pdfIn PDF document text
    • https://quatcongnghieput.com/uploads/files/senefumegosozonewo.pdfIn PDF document text
    • http://alkanboya.com/files/file///fofusikodos.pdfIn PDF document text
    • https://banghenails.com/upload/file/kagekesavebaz.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16094b84b13da3---77549055294.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160bf36160ba6f---takakamewanap.pdfIn PDF document text
    • http://prestopc.it/upload/file/33647650251.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/07f67882bff15d0bed6e6cbda45d38e9/40330654270.pdfIn PDF document text
    • https://bouveau-consulting.com/userfiles/file/jokalimodajudalozaji.pdfIn PDF document text
    • http://bioscipublisher.com/files/upfiles/file/firugorededobepe.pdfIn PDF document text
    • https://motiwalainstitutes.org/userfiles/file/digexaxodedufil.pdfIn PDF document text
    • http://ventiliatoriai.lt/js/ckfinder/userfiles/files/dozuvurorujozaganoguko.pdfIn PDF document text
    • https://ctapigroup3.com/contents//files/31057873713.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/161110788b0995---88792648357.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/bijuxejixipibipofejem.pdfIn PDF document text
    • http://yilip.net/userData/board/file/zimanagaxilotejade.pdfIn PDF document text
    • http://fecoil.com/userfiles/file/94539230554.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/f29e7e80859961e3fb2dc79bb0bf27e1/neluxonikapidijomowava.pdfIn PDF document text
    • http://totoquynhhuong.com/upload/files/jaboxikesoniji.pdfIn PDF document text
    • http://anaminfo.com/attachfile/file/zodoruxanirimulosiro.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160705818df5c3---44861778123.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb229b64ceb---94592115659.pdfIn PDF document text
    • http://paynechapelduquesne.org/clients/9/9b/9b910c66cef3ae2d1bb1fd5804160a19/File/21337418596.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160977e86dd26b---bedusirujuvizi.pdfIn PDF document text
    • 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_off0001772f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1772F 18524 bytes
SHA-256: 6fbc90586720466f67b571ad07e427a88f9a7189e82d0e4c69f8a72bf3dc6cde
font_01_sfnt_off0001a6a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A6A9 10832 bytes
SHA-256: a47fb57c0d437fbb2e4486c8b7288059a44eeeb848703308be50f695d72333b3
font_02_sfnt_off0001bfb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BFB1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1