Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c46cd9183ee3082…

MALICIOUS

PDF

70.7 KB Created: 2021-06-01 17:11:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 375102b4acc86abf90aeb92657d2f21f SHA-1: c040fe2ee74127897cc4ce105219cfd2e5fa2b45 SHA-256: 7c46cd9183ee30829ffdf7da8c43337c07e6cde224aa788c7d165f3dfe32494e
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous external links, forming a link farm, with one prominent URL related to 'adobe professional 7 activation code'. This suggests the document is designed to trick users into visiting malicious sites, likely for credential harvesting or malware distribution. No scripts were extracted, but the presence of multiple external links points to a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://drafthe.ru/pbw?utm_term=adobe+professional+7+activation+code PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370273/normal_5ff623a967953.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463825/normal_5fd64a044fdf5.pdfIn PDF document text
    • https://vozuzuxe.weebly.com/uploads/1/3/4/3/134314749/lugizepavuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380210/normal_604147d6d81a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417998/normal_5fcc320953646.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443602/normal_5fdcff6445314.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376359/normal_6017de2f8dbf8.pdfIn PDF document text
    • https://bavazaje.weebly.com/uploads/1/3/4/3/134335981/efbbaf8a7a1d246.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418184/normal_5feba456c7ba4.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/e5cc2a90-9232-4a28-bed5-5aab38556ab5/wind_in_the_willows_picture_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aabae099-cd94-4440-834c-7ee1addbf2fc/78578712778.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd95fb6c-2d82-440f-9240-99f3610d0344/devepuriwo.pdfIn PDF document text
    • http://negaboxa.pbworks.com/w/file/fetch/144455019/tatedebuzed.pdfIn PDF document text
    • http://wojipag.pbworks.com/w/file/fetch/144426747/20112502917.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0734c55b-c485-448b-98bc-8b4a12d2039d/17005074340.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_off0000d692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD692 5416 bytes
SHA-256: fbda57ecd651fb61b7ec3e74fd7efc401711a7c1bf8a6cb5a1d3798392f24111
font_01_sfnt_off0000e916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE916 10852 bytes
SHA-256: e0583375ea5e1e6a35964380f52e3504b1da77255198f2545ce29746dd3c3acd

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