Malicious PDF — malware analysis report

Static analysis result for SHA-256 0028e592ed4754d2…

MALICIOUS

PDF

81.3 KB Created: 2021-05-15 17:21:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b26b4458469ca10feeeb9d8dfd80f221 SHA-1: 18cca4f068520219895f3d6fef78426caf1d9574 SHA-256: 0028e592ed4754d2d044ed3d352ab38ca09422f5c7545c95c57f855edb173174
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically pointing to a domain associated with a printer power adapter search term, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful sites.

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/strik?utm_term=hp+6700+printer+power+adapter
    • https://xoludebule.weebly.com/uploads/1/3/4/5/134526363/5033109.pdf
    • http://onlinetyz.xyz/mejores_frases_del_libro_la_maestria_del_amorhb7jw.pdf
    • http://xosubowavenu.mypressonline.com/modal_auxiliary_verbs_chart.pdf
    • https://gogadumipoti.weebly.com/uploads/1/3/1/0/131070618/venalisofa.pdf
    • http://ziwusis.getenjoyment.net/how_do_you_calibrate_a_hayward_salt_system.pdf
    • https://cdn.sqhk.co/woragumokewi/5Jghicw/driving_zone_russia_apk_hile_indir.pdf
    • http://winoraama.website/502808434848776v.pdf
    • http://secureappeal.com/3372801598c80id.pdf
    • https://cdn.sqhk.co/zimofuzam/idzhibU/freeze_dance_halloween_music.pdf
    • https://kesoxebexug.weebly.com/uploads/1/3/2/6/132681937/dapasugudid.pdf
    • http://wulutano.mywebcommunity.org/an_introduction_to_language_and_linguistics_textbook.pdf
    • https://cdn.sqhk.co/lizupasepafu/hc7BThd/labasuxaxe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fokapikow/beading_books_for_beginners.pdf
    • https://245df057-3761-468b-8bc4-2c9c6734f7c7.filesusr.com/ugd/06c8e1_4a53e4c9909e4708885a8333bc7677d8.pdf?index=true
    • https://s3.amazonaws.com/pigolo/lalinilezusipoviru.pdf
    • https://2ea9429b-0332-4ee6-bb75-ab9535b56c99.filesusr.com/ugd/e2f7e1_24782b0d722b4bd9b559381a4b6e3ab3.pdf?index=true
    • http://rinimodosejowuf.myartsonline.com/how_long_to_cook_pork_loin_in_showtime_rotisserie.pdf
    • https://1482387f-61d8-47e1-b538-9b7f1e8b89fb.filesusr.com/ugd/538d67_7e8664194471458ea607ddbbc8b47a0b.pdf?index=true
    • https://989eff4c-946f-4221-9817-1a8d60f2082d.filesusr.com/ugd/7edf14_a0d1252a88fc4e4d825788596031f0f8.pdf?index=true
    • https://78bdfa25-736e-4945-a764-db21511aacb9.filesusr.com/ugd/9bd82e_208156c79a044981a56731a4576541ce.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010049.bin
d7cec8fd0a887b65b14736368d20326a20310fa6dd520e32d05e7ca6c41e8982		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10049 5172 bytes
font_01_sfnt_off0001120a.bin
eb48d1316306d9c963fdf3088f5a25854d49e5add322e7bbbefcc0d54be3e4fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1120A 10612 bytes

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