Malicious PDF — malware analysis report

Static analysis result for SHA-256 94c69ff188ef343a…

MALICIOUS

PDF

70.3 KB Created: 2020-12-22 02:52:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5b4fcf43ae8dd26022bfe74087e32110 SHA-1: 9c3e495d17dbd19e795ed16b03ec9fa51520591d SHA-256: 94c69ff188ef343af41dc51fe3aad40e39f09177a54c1c9c5b61f29136c00542
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://trafftec.ru/strik?utm_term=speed+motorsports+toronto PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4453540/normal_5fc8a8b5ccc5b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496391/normal_5fccbd964b8d2.pdfIn PDF document text
    • https://vajibenutiw.weebly.com/uploads/1/3/4/4/134487234/zefojaruj-dunutina.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417531/normal_5fbd6cf42e4a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369769/normal_5fce6df6e346f.pdfIn PDF document text
    • https://zunenevalomedo.weebly.com/uploads/1/3/4/8/134855990/gewel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489041/normal_5fb982e4586bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373243/normal_5f9c36d193783.pdfIn PDF document text
    • https://goreduve.weebly.com/uploads/1/3/2/7/132740848/ba86322.pdfIn PDF document text
    • https://bekijarodik.weebly.com/uploads/1/3/4/6/134617997/negasezufit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444657/normal_5f9e35c053637.pdfIn PDF document text
    • https://sapezirotup.weebly.com/uploads/1/3/4/5/134576964/36b1d3cdaad76b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390996/normal_5f9159a3b6f60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402267/normal_5fa417e8747ee.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/6b1c06f5-c043-4727-9393-6a4b481c004f/world_history_midterm_study_guide_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13f2d917-32c2-455b-9ed1-a5ddbd41b7b6/20886889460.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A1 4964 bytes
SHA-256: d19d99bef00dfabca1b5468e69cec91cd141f6a8d73114a42f76d8fa668e327a
font_01_sfnt_off0000e76c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76C 10728 bytes
SHA-256: 8b049619d6424cb22f3fb92800534573fde2132fa1cccc6a5ed35dd495ec6194

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