Malicious PDF — malware analysis report

Static analysis result for SHA-256 72d3384cd57c1395…

MALICIOUS

PDF

72.7 KB Created: 2020-11-25 07:59:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ae5cbef65e5522b01edbe33e9a5abef SHA-1: 73f3ac155430839964731f60a6193c7ffd8f68bf SHA-256: 72d3384cd57c1395b3f19aaf7d6b08c134358c083786b697271e0fc39586097d
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that appears to be a lure for downloading content, disguised as a search result. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the presence of an external URI suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/123?utm_term=medical+surgical+nursing+pdf+joyce+black+pdf+download
    • https://cdn-cms.f-static.net/uploads/4419847/normal_5f9c9a6dd46e2.pdf
    • https://cdn-cms.f-static.net/uploads/4377116/normal_5fa3e78eadd91.pdf
    • https://cdn-cms.f-static.net/uploads/4414682/normal_5f985e7585362.pdf
    • https://cdn-cms.f-static.net/uploads/4419623/normal_5f9ba23f275e3.pdf
    • https://cdn-cms.f-static.net/uploads/4476780/normal_5fbc879baeb4f.pdf
    • https://cdn-cms.f-static.net/uploads/4380530/normal_5f988aa9dc25f.pdf
    • https://cdn-cms.f-static.net/uploads/4369495/normal_5f8919a0d6bb8.pdf
    • https://cdn-cms.f-static.net/uploads/4487918/normal_5fb688402669b.pdf
    • https://cdn-cms.f-static.net/uploads/4415739/normal_5fbd3a40d3ec0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/0f0a1959-897a-4645-b8f0-d31d1b2f8a3c/kilovoleku.pdf
    • https://s3.amazonaws.com/jadere/monedidaxatijesaruxaxer.pdf
    • https://s3.amazonaws.com/zojizu/insurance_meme_yoda.pdf
    • https://s3.amazonaws.com/sinadi/81361938052.pdf
    • https://s3.amazonaws.com/sugowubuf/revopefupalijezuxitivigu.pdf
    • https://s3.amazonaws.com/jowutoneranemuk/65880322060.pdf
    • https://uploads.strikinglycdn.com/files/c7228f6c-6498-46c9-a990-80de588f9529/pitbull_puppies_for_sale_in_greensboro_nc.pdf
    • https://uploads.strikinglycdn.com/files/8bd1878a-8200-4013-916a-f130de096ac0/71287037436.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d178.bin
b4297f533667d242d973c03acd570a12b41e8e5a00e22604749f9841fb5ca5de
pdf-font-stream PDF embedded font (sfnt) at offset 0xD178 5604 bytes
font_01_sfnt_off0000e4a5.bin
bf1a9a265dadf047889a2280e4f79025ee5a2eb235bcce9ad76e10099c15fa4a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A5 10172 bytes
font_02_sfnt_off00010769.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0x10769 4324 bytes