Malicious PDF — malware analysis report

Static analysis result for SHA-256 c63860b3aa636980…

MALICIOUS

PDF

87.9 KB Created: 2021-05-24 20:04:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 00d1d686e00df63d2b5f4b65ca617ff4 SHA-1: c53a1a3191625308fc83d5580d850b65d8d160f3 SHA-256: c63860b3aa6369805e70a728a9331d89356276a2162573b504b585ffa0c031b7
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, with one prominent URL pointing to 'ponafet.ru', suggesting a phishing or malicious redirection attempt. The PDF structure also indicates a link farm, likely intended to drive traffic to various sites.

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://ponafet.ru/strik?utm_term=sister+keri+burnor+website PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4415052/normal_5ff0e8323a1eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389604/normal_5ff9892fa6d9a.pdfIn PDF document text
    • https://mojabizozawobe.weebly.com/uploads/1/3/4/6/134699592/3262314.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470977/normal_60119e6f2356a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500438/normal_60012c7811b05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383460/normal_600a61fe62d78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365655/normal_600fccbe16921.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481836/normal_600b4c1b72a7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380863/normal_6022ec302c762.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472479/normal_60520014697d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472793/normal_60390ebfa15f5.pdfIn PDF document text
    • https://revafabeku.weebly.com/uploads/1/3/4/7/134708131/4941486.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384046/normal_5fe34ff47cd32.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459180/normal_5ff033f921a78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378599/normal_606b6f00e8d14.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/pegozegi/certifying_officer_legislation_training_exam_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/google_chrome_apk_for_android_phone.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_off00011db5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB5 4836 bytes
SHA-256: bbf5012a5bbe22f07bd1a3752a05322625e498810a6b44b55560ef52d47e60e5
font_01_sfnt_off00012e4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E4C 10720 bytes
SHA-256: 77236240e02aa795214522adfe211b9c816ec24891c4d7d602b4a1426044cdc2

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