Malicious PDF — malware analysis report

Static analysis result for SHA-256 afe576ebd2f8904b…

MALICIOUS

PDF

78.7 KB Created: 2021-04-06 03:21:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f50a26b370d2424af11ccdebcae2836d SHA-1: 5991ddaf710779edd6762fb23b566fdac9fbbe91 SHA-256: afe576ebd2f8904b05189c03054976a5b0a3b90d8907945d1ec204a10c69f7f1
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation 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://xezojetit.ru/strik?utm_term=beethoven+sonata+%2523+14+moonlight+op.+27+no.+2 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426260/normal_60028bf3c724a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366664/normal_5fcb6ece233ab.pdfIn PDF document text
    • https://cdn.sqhk.co/vivupedasez/fjfEja7/faseyha_recharge_viber_number.pdfIn PDF document text
    • http://xenalebosob.scienceontheweb.net/67609549052.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467300/normal_5ff7d5c2661d9.pdfIn PDF document text
    • https://cdn.sqhk.co/digipexula/ibghtgi/euro_train_simulator_mod_apk_revdl.pdfIn PDF document text
    • https://cdn.sqhk.co/tefozakozup/ejjgg7K/newegg_ps5_digital.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485828/normal_5fd64b992fdfd.pdfIn PDF document text
    • http://jojidasusesot.sportsontheweb.net/79402950458.pdfIn PDF document text
    • https://cdn.sqhk.co/nozelenid/LC4Cij8/space_shuttle_flight_deck_layout.pdfIn PDF document text
    • https://cdn.sqhk.co/nixivezez/aibggUm/hot_rod_lincoln_lyrics_asleep_at_the_wheel.pdfIn PDF document text
    • https://cdn.sqhk.co/gabebutiz/hbOjg1H/81924996867.pdfIn PDF document text
    • http://nitesufi.sportsontheweb.net/how_to_make_your_own_crown_royal_peach.pdfIn PDF document text
    • https://cdn.sqhk.co/gasajolop/cggLsP4/runamoruwil.pdfIn PDF document text
    • https://ninisezidopif.weebly.com/uploads/1/3/5/3/135391617/bafolelevu_jijekuvenarisoz_lufafuxurufi_wimujizud.pdfIn PDF document text
    • https://cdn.sqhk.co/lofakekaf/hijcuji/mezenejumadowuzowezav.pdfIn PDF document text
    • https://sopogokatoluj.weebly.com/uploads/1/3/1/0/131071191/beee9.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/jje8hgb/beat._ly_music_video_maker_with_effects_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496605/normal_60341b71ed0b3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wovodijulenape.onlinewebshop.net/6492680766.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_off0000ed29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED29 4756 bytes
SHA-256: 1189356713258ece9424f6b90a8241fd6797b178fccce1472d7d6fef4856c772
font_01_sfnt_off0000fd58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD58 21080 bytes
SHA-256: c3b6542f445f9d5a3d868cba673704e51001ba21ade2375dee89a3fdcc174bbd

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