Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9ae7ddf36f5f3fe…

MALICIOUS

PDF

70.8 KB Created: 2021-02-22 05:28:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 324417ceea97f55d8c769a4e46780a84 SHA-1: 4299e875dfdf8587be39b14724e600622596c523 SHA-256: d9ae7ddf36f5f3fe292eea93da5dd299d00e2854f2ffcc84335c4e921e868f64
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, identified as a "PDF_SEO_LINK_FARM" heuristic, suggesting a phishing or SEO manipulation tactic. The embedded content, though heavily obfuscated, appears to be part of a lure related to a "sealfit wod journal pdf". The presence of external URIs and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/wix?keyword=sealfit+wod+journal+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366017/normal_6008c2de09a94.pdfIn PDF document text
    • https://tonurokekar.weebly.com/uploads/1/3/4/4/134456200/xexezul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443342/normal_5fcbd47493f4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428342/normal_6015db09ade59.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446633/normal_5fee3d03499b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460043/normal_5ff708b56926e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503578/normal_5fed9050c29fa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384030/normal_5fdf57b464f8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417658/normal_600a4aa8d10e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408596/normal_5fc5bc679a861.pdfIn PDF document text
    • https://nemelodanunoju.weebly.com/uploads/1/3/0/8/130874480/9fe06b1b56768d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454306/normal_60323c137171f.pdfIn PDF document text
    • https://jomigivava.weebly.com/uploads/1/3/5/3/135330213/gutorixiladoza-bitotowiwupabop-talizemiranalop.pdfIn PDF document text
    • https://cdn.sqhk.co/wuwoxegolewa/vZ55Fid/tiraniw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448550/normal_5fd04e339c8cc.pdfIn PDF document text
    • https://jabifuvos.weebly.com/uploads/1/3/1/0/131070291/lulusizarelowazinix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fifuto/44109906253.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/11504441065.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/73472443380.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1A 5128 bytes
SHA-256: cad6255b8dbf529cfeaf89800fa578645008710c9f6237b9e63cf01157001ca2
font_01_sfnt_off0000ebb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB4 10100 bytes
SHA-256: f6d11ab8507d0b445e2ddd5a346a0b7282dd151d504e243aacb839613efbf693

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