Malicious PDF — malware analysis report

Static analysis result for SHA-256 08ac02c63dc7594c…

MALICIOUS

PDF

77.9 KB Created: 2021-05-09 00:30:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 284d66cdfb41674020b62c7b1939adce SHA-1: 7119a9b145e3ca24147d3a56382a9c8935802b36 SHA-256: 08ac02c63dc7594c4b0e4be702c9a642e0fa32ae052029c48a5b4a952f302ff3
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://zajinet.ru/strik?utm_term=3+stocks+to+buy+motley+fool PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485929/normal_601533fb08ada.pdfIn PDF document text
    • https://cdn.sqhk.co/jinubodilev/jaKigjg/cooking_express_food_fever_craze_chef_star_games.pdfIn PDF document text
    • http://jajitefufig.iblogger.org/does_shiro_die.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449603/normal_6016041418fd1.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/j7sjdLc/dewagifuwarajufoguvovezu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427499/normal_6052a48ad6342.pdfIn PDF document text
    • http://rapukenafep.22web.org/kujabulubajusaxusum.pdfIn PDF document text
    • http://vowewudimo.mypressonline.com/79148973599.pdfIn PDF document text
    • https://cdn.sqhk.co/gonaxetuped/93djhZs/tv_serial_ringtone_free_download_for_mobile.pdfIn PDF document text
    • http://tajizomekoza.iblogger.org/scales_chords_arpeggios_james_bastien.pdfIn PDF document text
    • https://cdn.sqhk.co/muditazu/NRUPhiX/34870888758.pdfIn PDF document text
    • https://cdn.sqhk.co/vovigewuva/DJjiKjc/graves_disease_management_guidelines.pdfIn PDF document text
    • https://cdn.sqhk.co/bidogefapo/BiiMjbw/rasivilojudujadalunaxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468828/normal_6054e507236c5.pdfIn PDF document text
    • http://nipawifaxupus.mygamesonline.org/bukhari_shareef_book.pdfIn PDF document text
    • https://cdn.sqhk.co/xaranoraf/gfjajab/xesofebi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zilowovuv.atwebpages.com/understanding_media_the_medium_is_the_message.pdfIn PDF document text
    • http://fekamenuzexogam.epizy.com/android_tablet_walmart_canada.pdfIn PDF document text
    • http://gozobemuwapu.rf.gd/mixuxoputerirerorugil.pdfIn PDF document text
    • http://jenepopavuse.epizy.com/gamesir_joystick_pc.pdfIn PDF document text
    • http://xujekapowizi.epizy.com/allow_ie_to_files.pdfIn PDF document text
    • http://zotomogizolelaz.rf.gd/adolescent_psychology_syllabus.pdfIn PDF document text
    • http://naremijex.epizy.com/68773818154.pdfIn PDF document text
    • http://xifofemixogo.rf.gd/danby_countertop_dishwasher_measurements.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_off0000f261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF261 5096 bytes
SHA-256: ca1b578dd8961ceba0e78666e9ba309f9e4cc02913449c5d10e83bc6c30d13ff
font_01_sfnt_off000103bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BD 11408 bytes
SHA-256: a0bbfc2061072d83618e5e7f7bac4b9c019ef9d71bc3ccb8b7f4935f65aaa4f1

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