Malicious PDF — malware analysis report

Static analysis result for SHA-256 30928d3bcbbf252e…

MALICIOUS

PDF

109.6 KB Created: 2020-12-01 07:54:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: e32d4427e9d1b4ecd69526c9ab0acb6c SHA-1: 24aa48403a52bf0942ca9a5cf4a61bb25c10c5c6 SHA-256: 30928d3bcbbf252eef3f9d5ab230a64557ecf0e238bf54f99700b803c7b182b6
156 Risk Score

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 0.9943

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://traffset.ru/123?utm_term=manual+dd+form+1610 PDF link annotation
    • https://lotijilakoda.weebly.com/uploads/1/3/4/4/134468432/6d3f73e.pdfIn PDF document text
    • https://bepikirutufuw.weebly.com/uploads/1/3/4/8/134866592/saneva.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/5fc0f2f6c89e1c4b8fbea157/t/5fc5788f173fb5383b5d91ba/1606776976611/the_joy_of_creation_steam.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e6f2be9b6939510ac55e/t/5fc53b0961e25426e1e1ffec/1606761227306/mijadixexapumogudoridubad.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/exotic_quest_destiny_2_lumina.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e80068612547ed5e2b99/t/5fc4ec0ecb3e0f5771e9c968/1606741006929/salululoketow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd293b85-cd29-4322-b0c7-3a5fca771471/zagajutetele.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf6688173fb5383b9a7939/1606379144576/rc_grave_digger_traxxas.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf64683485235c86be4fe9/1606378600918/does_ball_state_require_sat_essay.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_off00016fba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FBA 5228 bytes
SHA-256: 34214d618926469c67042aa09fc7a93e26b0063b1434c112eb6bc73acc81a687
font_01_sfnt_off0001817c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1817C 12500 bytes
SHA-256: cd70cbdcab0f1b8d36966ce568bb52e733866dc05e15b2d4a3f0de06319f318d