Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a657f617ad52677…

MALICIOUS

PDF

67.3 KB Created: 2021-02-21 07:15:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2a6c4169283108890404659dfaa8cee3 SHA-1: ede0376c1eb6b7b0d1d79525435d46d65ef2c3d6 SHA-256: 9a657f617ad52677254e4020e554bb5e25cb3b15190f1e017f4bb883854fd8c3
134 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains text related to a vinyl record, suggesting a lure to disguise the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://druttle.ru/123?utm_term=black+stone+cherry+the+human+condition+vinyl PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4496810/normal_5ffd44d344f95.pdfIn PDF document text
    • http://spindlndou.space/61529812823arcvc.pdfIn PDF document text
    • http://adanakebap.org/nuxumexewofixexowaduxulztriz.pdfIn PDF document text
    • http://logvoz.ru/gekatelorerafudozlamj.pdfIn PDF document text
    • http://hook-up.fun/albion_online_pvp_guide1i62a.pdfIn PDF document text
    • http://steelsho3.club/semiologie_de_l_appareil_genital_masculinoegf2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445742/normal_6012fb1c53969.pdfIn PDF document text
    • http://itsnat.space/9453668741o0w6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380088/normal_5fdb822372e1f.pdfIn PDF document text
    • http://grandov.pro/arduino_startertydlm.pdfIn PDF document text
    • http://spindlndou.space/1751130406gs1if.pdfIn PDF document text
    • http://help-verifiedbadgecenter.com/953041694880voul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://surewefuwiba.rf.gd/nomisopurowixeli.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/pronunciation_spelling_rules.pdfIn PDF document text
    • http://mipitevana.epizy.com/65779133295.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/on_my_way_pubg_song_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/aadukalam_mp4_video_songs_free.pdfIn PDF document text
    • http://sapataxetawot.epizy.com/84188521909.pdfIn PDF document text
    • http://kifowagumapoz.rf.gd/28731114163.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/aequor_information_technologies_pvt_ltd_glassdoor.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_off0000c954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC954 5452 bytes
SHA-256: 3e4d734d7081fc52740717c84a5da8c682e24e7801ff6563534febfe5f4e3149
font_01_sfnt_off0000dbc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC2 10752 bytes
SHA-256: 335c0e33e695ce4b29bc04ebef01d1bc3a6f9f6dfa3d8305c3fb72b6e8eb163b

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