Malicious PDF — malware analysis report

Static analysis result for SHA-256 70f00aa05dd50336…

MALICIOUS

PDF

80.1 KB Created: 2021-03-13 17:31:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ef01fc7198edc54b7469d78ebfe5e9c SHA-1: 7261a096b90c76dbd0d8789e840025ca29e41cde SHA-256: 70f00aa05dd50336a45e8bea99db06f4911d3821d720ae81f65b58e059888da0
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs pointing to suspicious domains, and heuristic analysis indicates it functions as a link farm on disposable hosting, likely to distribute malware or conduct phishing. The ML classifier and ClamAV detection strongly suggest malicious intent, with the embedded URLs serving as the primary mechanism for directing users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://vilenefex.ru/wix?keyword=most+commonly+prescribed+medications+pdf
    • http://zokuzovabodoloj.22web.org/mefilanugukamakegiguwef.pdf
    • https://cdn-cms.f-static.net/uploads/4392869/normal_6011201ae1638.pdf
    • http://saudiautoinsurance.com/random_game_name_generator_fortnite4oybo.pdf
    • https://cdn-cms.f-static.net/uploads/4502721/normal_601f7ea8d65f1.pdf
    • https://cdn-cms.f-static.net/uploads/4369309/normal_602d65fda7617.pdf
    • http://tobufupevujuma.mygamesonline.org/car_engine_parts_diagram.pdf
    • https://cdn-cms.f-static.net/uploads/4409621/normal_600e0563bb8a7.pdf
    • http://widonatozeg.mypressonline.com/70279956429.pdf
    • https://static.s123-cdn-static.com/uploads/4391893/normal_5fca6c7c4fc64.pdf
    • http://idealicait.website/dejegusoladitepipmhhm.pdf
    • http://micrometer25bill.site/jp_morgan_chase_bank_contact_email561x3.pdf
    • http://toppiksnack.xyz/tibusasm0qx.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://xujogefup.rf.gd/nowidujatimobi.pdf
    • http://dezinolabebosod.atwebpages.com/25353902601.pdf
    • http://nazozogev.epizy.com/vugavox.pdf
    • http://nofolimuri.myartsonline.com/romugiserazawizutenobazel.pdf
    • http://xukonepuwe.rf.gd/tony_robbins_unlimited_power_book_review.pdf
    • http://milibelibagusez.epizy.com/53260565039.pdf
    • https://s3.amazonaws.com/puretulenuza/bazaar_full_movie_filmywap.pdf
    • http://kugibujupedo.rf.gd/how_much_does_ipad_mini_2_cost.pdf
    • http://xoxemofunox.epizy.com/looney_tunes_world_of_mayhem_team_guide.pdf
    • http://kiluwemu.rf.gd/wixizaxawuxutup.pdf
    • https://s3.amazonaws.com/pululusodogi/wordscapes_answers_level_8233.pdf
    • http://noderisaxe.rf.gd/mukuzetokiwimomeg.pdf
    • http://tiwebukesa.epizy.com/home_finance_excel_spreadsheet.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee67.bin
3b248e4ef959de03a6c1c2d95e1ca3339ce9b21a6404e0a50507842ecd6db31b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE67 5336 bytes
font_01_sfnt_off00010079.bin
71cef2eebb81c4932fcacf9eee7f4ce31b766f783e84802fc96015ec47f26397		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10079 10564 bytes
font_02_sfnt_off00012496.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12496 4324 bytes

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