Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a37ecd757efb672…

MALICIOUS

PDF

73.8 KB Created: 2021-02-22 05:37:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 37fbd7d024f699702e4368038807bc9f SHA-1: b1c08081a6121ad7a13748974ac7401f363e404a SHA-256: 5a37ecd757efb672bbf74befc9e5c747341247288f1f01ba8f5ce9d9e4b98dfa
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, contains text related to a "Magna power battery guide", suggesting a lure to trick users into visiting the associated malicious domains. The presence of external URIs and link farm heuristics further indicates a malicious intent to redirect users to potentially harmful content.

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://seumenha.ru/wix?keyword=magna+power+battery+guide PDF link annotation
    • https://vakilelem.weebly.com/uploads/1/3/1/3/131379598/legewogegexobi_desovojubabaki_ravijupel.pdfIn PDF document text
    • http://compte-cmbretagne.best/14339623301xl2mu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444643/normal_5fdd3e07bf64f.pdfIn PDF document text
    • https://cdn.sqhk.co/vekokoze/jhihYb8/4520284986.pdfIn PDF document text
    • https://butemupow.weebly.com/uploads/1/3/5/3/135338881/rabupijuvur-wabiwew.pdfIn PDF document text
    • https://bajumavo.weebly.com/uploads/1/3/4/4/134486103/1c69128d21732.pdfIn PDF document text
    • http://kmikaerfs.ru/aeschylus_oresteia_themesp6g6d.pdfIn PDF document text
    • https://cdn.sqhk.co/fokivetezabu/bfhiTha/refuvipu.pdfIn PDF document text
    • https://bikizulotozenap.weebly.com/uploads/1/3/1/8/131860645/wavinexa.pdfIn PDF document text
    • http://xitnet.fun/strongs_exhaustive_concordance_hebrew_dictionary2c5ix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409255/normal_5fc5763edf03c.pdfIn PDF document text
    • https://cdn.sqhk.co/dukosisevu/gF8Yjhj/survival_prison_escape_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/ranetixeba/rtgejcc/megan_thee_stallion_songs_list.pdfIn PDF document text
    • http://pink-echo.club/o_sol_da_meia_noite_livrobjt8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413714/normal_5fe1bc63124d3.pdfIn PDF document text
    • https://cdn.sqhk.co/jitolado/jagfghC/68861110733.pdfIn PDF document text
    • https://cdn.sqhk.co/tedavevata/qGhdjhY/streamer_life_simulator_cheat_table_v1._0._1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e1dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DD 5256 bytes
SHA-256: 8d644bac9146914ee5698048d1434b6ec5fcbe77dd5b68ef9423bc68ae410be8
font_01_sfnt_off0000f3ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3ED 11488 bytes
SHA-256: e335b4be5ba0430df0b370d561e522811050a308e965ef0902acaf5fbb37db83

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