Malicious PDF — malware analysis report

Static analysis result for SHA-256 7472fa6866627d46…

MALICIOUS

PDF

95.3 KB Created: 2021-07-01 16:25:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: be0cc5eb6df18b85ba5c1c2723d33bc5 SHA-1: 580a54bd0a474cf58415432385de644570a0a268 SHA-256: 7472fa6866627d46578adba20acfa2c6cab4efccdf30a038ddf87536831d66eb
184 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. It also includes direct links to an IP address and several compromised websites, likely serving as a distribution point for further stages of the attack. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://thegreenlegacykeepers.com/clients/e/e8/e8dc17949b7ef813e9937e453902477f/File/28090399515.pdf In PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/1046469133609b6b7997072.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160c690c8631b0---28767735209.pdfPDF link annotation
    • https://sieuthigo.vn/upload/ck/files/34005376794.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-4-30/20210430001420541041.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/7206476104.pdfIn PDF document text
    • http://salkim.com/userfiles/file/tojojubonelovoxol.pdfIn PDF document text
    • https://arte-salon.ru/upload_picture/sonavora.pdfIn PDF document text
    • http://nfc.soo.jp/file/55850068158.pdfIn PDF document text
    • http://fernandopelosini.it/userfiles/files/zazolafonolamewero.pdfIn PDF document text
    • http://www.bandungmesin.com/file/jefonukozadomilubo.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf1d69ee18e---sijebimat.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/a8a62f10507728b578006c2b3c86d3b3/42497711206.pdfIn PDF document text
    • http://szsahsh.com/uploads/files/692922488.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/9d491381a7aa1d07ca3ec09e438e856e/79516838062.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074b817dc665---39953140085.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16088a837be3bb---25312914404.pdfIn PDF document text
    • http://mertlakustika.cz/images/pages/file/sekizekimedopisogakuboma.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074af0a4273a---zitekuvexuladap.pdfIn PDF document text
    • http://stjconsulting.it/userfiles/files/galugitanawobemuwokevowa.pdfIn PDF document text
    • http://circolonauticofavignana.it/userfiles/files/45298709094.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/8539bdf1631b8d88767253b0a24a06a8/zomedakimewe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=be+angry+but+do+not+sin+kjvPDF 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_off000111f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F6 11072 bytes
SHA-256: 491afd6b3a4c96381d83d78f1bd2c76e460e4375fa3c8a088c1f15be9e71513c
font_01_sfnt_off00012bb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BB5 17116 bytes
SHA-256: 5857503ed7aafdbe93d62b75d1cf12c9e1f32ac3b45ea497420efaf17057fcc6
font_02_sfnt_off0001581a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1581A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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