Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bc0eaf7214cc926…

MALICIOUS

PDF

69.5 KB Created: 2021-03-30 22:41:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8874779309b07725be47707bfca798e4 SHA-1: e74455ac711d999463657ddedee70f4f4d9d112f SHA-256: 3bc0eaf7214cc92692fa7a18f363181b877a5962eff8112a8f61f2c7db7fb28d
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 6

  • 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.
  • 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://dugedepap.ru/strik?utm_term=what+grade+level+is+junie+b+jones+series PDF link annotation
    • https://cdn.sqhk.co/sipobufiw/jgggHhc/nozezosozobitiwizofetave.pdfIn PDF document text
    • https://bowilidorufe.weebly.com/uploads/1/3/4/6/134603038/2865117.pdfIn PDF document text
    • https://cdn.sqhk.co/nemazuwigumo/bidPPxV/ranked_smite_crossplay.pdfIn PDF document text
    • https://cdn.sqhk.co/dubutemaruxu/9ihr3HV/wanefamadibek.pdfIn PDF document text
    • https://cdn.sqhk.co/remezebona/ieeghgi/boxajejiresekixo.pdfIn PDF document text
    • https://cdn.sqhk.co/manaruparil/lzjbTge/39532901410.pdfIn PDF document text
    • https://patawera.weebly.com/uploads/1/3/4/1/134131312/4029573.pdfIn PDF document text
    • https://rakulemiz.weebly.com/uploads/1/3/2/6/132682689/lixenopebi.pdfIn PDF document text
    • http://natikolom.site/candida_dietyzcvz.pdfIn PDF document text
    • https://bazeliwelari.weebly.com/uploads/1/3/1/8/131857734/1484639.pdfIn PDF document text
    • http://rkconstructionsucks.com/555551368668rir1.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/ggggh7S/1_b._o._t_unit_is_equal_to.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/1e6e4c65-e968-43ed-a29a-370da11c6963/83144801125.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/136e0445-dd53-4bf7-9a38-643ebcd37f84/the_end_of_the_affair_book_2_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10049b78-b384-4df3-b23f-6543b0b2cb19/satanic_rituals_of_dracula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26db25d6-399e-4ae8-8d71-58249bbec7b2/satapezuxenu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2a820f5-ece3-45ee-bab1-db6fda682b4e/greek_septuagint_interlinear.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_off0000d354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD354 5376 bytes
SHA-256: ca7c0fa41b778e9e6bae51cbeac42fc9582e554ddbd3f07ff39daba9a0a27067
font_01_sfnt_off0000e5aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AA 10312 bytes
SHA-256: 87f35cfe40b6a01327214cd2f45f564d60566058a753403feb10431c847d11f1

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