Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a22e8730c1f5e9a…

MALICIOUS

PDF

69.9 KB Created: 2021-03-02 21:10:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d654ccab7a780b04477f1b7a735ae47c SHA-1: 756566144e4c09f50c4f2634bef6b6697d5ca1be SHA-256: 7a22e8730c1f5e9abe27665b6df0e0a81f5d69ea92ee80624a2321b69307977b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are associated with link farms and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://leonvi.ru/strik?utm_term=mary+poppins+book+pdf+free PDF link annotation
    • https://cdn.sqhk.co/fapiwejagiz/j2UJjh9/casino_games_slots_adventure.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489440/normal_5fca4bf2de2e7.pdfIn PDF document text
    • https://cdn.sqhk.co/ximirujusuxo/gihejbV/rogue_hearts_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414335/normal_6018781fbcbce.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/jicmA0l/dupizupokadudinipopiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384634/normal_60354a477cd28.pdfIn PDF document text
    • http://milanbeachs.space/adverb_clauses_worksheet_with_answeruzgpp.pdfIn PDF document text
    • https://cdn.sqhk.co/vemegunir/7jdQhjb/wisuluromif.pdfIn PDF document text
    • http://niburufajanuto.sportsontheweb.net/wagopiribagajifebiverar.pdfIn PDF document text
    • https://cdn.sqhk.co/webuzifinuno/uFighen/kukon.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/jihhhH7/xavexavijosusugesebawisad.pdfIn PDF document text
    • http://indir-kazan.com/beats_studio3_wireless_over_ear_headphones_-_whiteaeqb1.pdfIn PDF document text
    • https://cdn.sqhk.co/duponetix/aEheic0/afk_master_tier_list.pdfIn PDF document text
    • https://cdn.sqhk.co/votijavos/jajjijf/teweginagako.pdfIn PDF document text
    • http://pefiworawodud.mypressonline.com/wopomaret.pdfIn PDF document text
    • http://kulanefimolon.mypressonline.com/calculate_the_standard_reduction_potential_for_the_half-reaction.pdfIn PDF document text
    • http://krokoboko3.xyz/highlander_hybrid_maintenance_schedulel7am8.pdfIn PDF document text
    • https://cdn.sqhk.co/bowewulaxam/dktDibD/pinball_life_legs.pdfIn PDF document text
    • http://kopuvimu.scienceontheweb.net/47734098814.pdfIn PDF document text
    • http://gekifek.scienceontheweb.net/kezod.pdfIn PDF document text
    • https://cdn.sqhk.co/datolabevev/ihjfeic/twitter_search_date_until.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404959/normal_5fcf999fc90db.pdfIn PDF document text
    • https://cdn.sqhk.co/sirepajaku/jdgdBQP/88256389058.pdfIn PDF document text
    • https://cdn.sqhk.co/jagibuvat/jQhcsii/2220012245.pdfIn PDF document text
    • https://cdn.sqhk.co/rowazazapa/ifjj7ge/91865445641.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_off0000d399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD399 5312 bytes
SHA-256: 21577a82d77fee3caf472a9294fa613bc06b40f3126ae5ebb157048514463089
font_01_sfnt_off0000e5c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C7 10252 bytes
SHA-256: 1e0047cdc9f24c5ba587a2592979417365dd79256839f641102a27823b134381

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