Malicious PDF — malware analysis report

Static analysis result for SHA-256 351f92dbd1b0501d…

MALICIOUS

PDF

72.7 KB Created: 2021-01-03 07:50:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7eb6f0b8d91afce018737fb245ad3132 SHA-1: c113eb39b88602e5b7c1f6b060fce9f6f5bf617a SHA-256: 351f92dbd1b0501da5258155fb48b119e45f62e0894e24a7406bf14ca7ae329e
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/123?utm_term=wagner+ware+sidney+magnalite+4265-p'. This indicates the document's primary purpose is to lure the user to this malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/123?utm_term=wagner+ware+sidney+magnalite+4265-p In PDF document text
    • https://cdn-cms.f-static.net/uploads/4448743/normal_5fb81b89cd254.pdfIn PDF document text
    • https://cdn.sqhk.co/zavoragive/dghQhgD/oxygen_atom_have_charge.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393485/normal_5fc51a20cf968.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420250/normal_5fc282d22f157.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371014/normal_5f8d6d269abf9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366389/normal_5fd99372320b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424645/normal_5fd36c74a31f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369769/normal_5fc076a04cc07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422168/normal_5fc1a5431364d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/58d1cf24-48e8-419c-bf6d-e5856233c84a/35228540462.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b520474f-a52a-438b-a7c8-9c9ff890ebee/xapofugod.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/xovufofari.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_off0000da00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA00 6016 bytes
SHA-256: 00b414ebf85836f1d23f9e7109257492340b7116e565aefa1a5d175bced8b18b
font_01_sfnt_off0000ee98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE98 12056 bytes
SHA-256: 1c48ec3e7747a601ac0c60fa38653a17d9ff072de1f25e7848111402cc26a279

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