Malicious PDF — malware analysis report

Static analysis result for SHA-256 e12e22760e14d670…

MALICIOUS

PDF

74.8 KB Created: 2021-03-03 22:45:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 02abd4cf53da2822be944565e9a577b6 SHA-1: ed3dc9bae98633608cc5fed5ded935ee6b85b081 SHA-256: e12e22760e14d6707577a3be7d80b7fd2dc2b2583764f0c19879b72d77110dce
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting and another pointing to a suspicious domain. 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 payment, aligning with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://midufefew.ru/123?utm_term=how+much+do+alaska+natives+get+paid PDF link annotation
    • https://cdn.sqhk.co/xurakipigub/hfnjjPE/93290855943.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/ghfdMge/download_game_indy_500_arcade_racing_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/galudubujuwa/Gpgj1ia/xoxofutebexusu.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/52030768985.pdfIn PDF document text
    • https://cdn.sqhk.co/binisomomup/aWIhizr/mymcps_helper_login.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481168/normal_6009cda06ab2b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ligoroxenafof.atwebpages.com/kaluredajalaxijijuwuzavu.pdfIn PDF document text
    • http://fuvarijes.atwebpages.com/how_to_replace_panasonic_microwave_bulb.pdfIn PDF document text
    • http://saxodanokijaj.atwebpages.com/79602462541.pdfIn PDF document text
    • http://suboxasolu.rf.gd/atom_javascript_editor.pdfIn PDF document text
    • http://najorenowodume.epizy.com/music_sheet_stand_organ.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/romeo_and_juliet_act_1_scene_2_capulet_analysis.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_off0000e768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE768 5568 bytes
SHA-256: e48bfdbc82123240cde7ebc271f11ebd2e909d5d2e2d1fb6a7193c7c74468e0c
font_01_sfnt_off0000fa4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA4A 10660 bytes
SHA-256: 10fd99e72c7ab8bfbdfbd1581bca8074196f823911ccb71fd2cb72e5b423a697

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