Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a9cbf0747e63467…

MALICIOUS

PDF

76.2 KB Created: 2021-03-01 18:35:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0595e2f97f19db39d94111ae1cf055a1 SHA-1: b2cce7370b72f92a0fc3f5be0cb7faa1c27d7148 SHA-256: 5a9cbf0747e63467c4e91649706c1a489861e034983d9db22712b71f2884dc66
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to technical information, which is a common tactic for phishing and social engineering.

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://jacksth.ru/123?utm_term=how+to+calculate+boiling+point+in+pressure+cooker PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368740/normal_5ff0eb1933f52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457302/normal_5fd9a1e8ea126.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392868/normal_6018390b64b6c.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/vRYhiKp/funny_wrestling_2_player_games_y8.pdfIn PDF document text
    • https://cdn.sqhk.co/xelibini/VjeTzgh/3504908944.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/hdIbUia/66329229042.pdfIn PDF document text
    • https://cdn.sqhk.co/vizelupavew/HgfiiBv/popular_music_2019_list.pdfIn PDF document text
    • https://cdn.sqhk.co/wadelovelo/geJhhha/kafugunifafevemi.pdfIn PDF document text
    • https://cdn.sqhk.co/nizivatitogu/Wihhdjh/nafasafotavudogowikepevem.pdfIn PDF document text
    • http://harmony-market.ru/voyages_in_english5eteh.pdfIn PDF document text
    • http://getcreditreport.info/new_craftsman_chainsaw_leaking_bar_oilpau7u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381980/normal_5ff6787988c9d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367294/normal_5fe31494e89ea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sebubexegan.rf.gd/bukodekuv.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_off0000ed5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5E 5360 bytes
SHA-256: ff3cb6570ff99f0916b758dea9479fda9ea68ca837477e18952f8796981fb572
font_01_sfnt_off0000ffb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB6 10580 bytes
SHA-256: 2750c6d66e8b6284553ef9f8951b3cebd05e3d0b85668509ea885e7311f5c83a