Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5b9b8fe02da3154…

MALICIOUS

PDF

80.4 KB Created: 2021-01-04 05:48:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 9810e302e2ff746e9d4f85f7beabbacb SHA-1: e7825d1a48643dc467e358d859a0b4f6ca0e195c SHA-256: c5b9b8fe02da31540c03fb6b943a3e7081c5ed195c75e5eec75b6ec21b6a95ff
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links, one of which, https://ggtraff.ru/123?utm_term=uc+davis+svm+clubs, is flagged as a malicious redirector. The heuristic 'SE_URGENCY_LURE' suggests the document uses deceptive language to encourage clicks. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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
  • 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://ggtraff.ru/123?utm_term=uc+davis+svm+clubs In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393018/normal_5f92073a7df02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379964/normal_5fad9e9bd0f33.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wisatutadi/komededowonedexesozexeze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0563e107-89b3-4b40-b6e0-ad9502d11d23/amazon_original_mission_statement_1994.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/531fd553-1c3a-41f4-87ab-ca5672e4fbac/how_to_make_bone_knife_handles.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/american_pie_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bad35467-491a-4653-9f9d-a9a87001568d/ninja_stick_blender.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/free_digital_backdrops_for_photography.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c16f5a25-2139-4f8e-b826-d22dffa3647e/pavubizitowepek.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/ethiopian_orthodox_church_amharic_bible.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90eeca93-0cf6-4325-9f73-9ccc53d1ec96/zazuxujigenujipugadefelo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AF 4648 bytes
SHA-256: 8965e466808ff1c48e4ef9b6a7573e28e0a56501ae33634762d794973f46276f
font_01_sfnt_off00010278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10278 10644 bytes
SHA-256: 0825912c6f4afe76777e8ae160a6a204a0fc5befd76e013d1fa8cffb52bcda0c
font_02_sfnt_off000126af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126AF 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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