Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9ec00c955849686…

MALICIOUS

PDF

67.7 KB Created: 2020-12-06 10:03:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ddeed1bdfe4a5003ded5aa0a7bd36750 SHA-1: b3d3ec163dd914318dc105c9bf7a5897fa0d6da0 SHA-256: b9ec00c955849686c23ef0caccd9df467a0d33b2780447a1343429022d181506
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, which points to a suspicious URL. ClamAV also detected this file as a phishing trojan. The document body, though heavily obfuscated, contains text that appears to be a lure for a free PDF download, aiming to trick the user into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://traffnew.ru/strik?utm_term=dinner+at+the+homesick+restaurant+free+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4444386/normal_5fc6b859af120.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426571/normal_5fad5ae65b3ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405644/normal_5f95f174b7ab4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420599/normal_5fbc329779ff4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369651/normal_5f9109ba5db06.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4e9518e72e5fdbce14bf/1606373014294/california_astrology_association_horoscopes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1a26b9f-8ab5-497a-b396-4c535f3438ee/gtcc_jamestown_campus_address.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff50038f-b314-4c8c-91a0-a7f1916fefa4/diwowukosozuzus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cc58147-d0c9-48a7-b7b3-44000228f9ea/krystal_clear_saltwater_system_cg-26667_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b971e04-227d-4f9e-b814-6d96c9799fbb/tvg_watch_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0cc6dc14dfd36fef0f123/t/5fc0dd26173fb5383bc22466/1606475047672/offensive_lineman_creed_poster.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b3f5b7b-c54d-4037-afbf-a91ea5e24575/carolina_lyrics_country.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_off0000c8dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8DC 5428 bytes
SHA-256: da2b7e93b6bd47d503737c23a8878f1a8d0fff871efa25a93aded32da8cbfe98
font_01_sfnt_off0000db2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2D 12172 bytes
SHA-256: c68c649f2ccfc7a4c6c08a90bdfe6735da8a776edeff102e2ac60e6dab826cf2

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