Malicious PDF — malware analysis report

Static analysis result for SHA-256 e46bc81c238c6ca5…

MALICIOUS

PDF

65.9 KB Created: 2021-02-17 19:07:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 8985eecb029c60b3046d625f0b82ac82 SHA-1: 2adc38afa9c5286a9df9c478ac7297596d7d279e SHA-256: e46bc81c238c6ca5c0abfe9aee2ac5a3862f0cf9d20efaa02325f5c0ee39e622
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many hosted on disposable domains and disposable hosting services, indicating a link farm for SEO manipulation or to distribute further malicious content. ClamAV detected this file as Pdf.Phishing.Trojan, and an ML classifier also flagged it as malicious. The presence of external URIs and the link farm structure suggest it may be used to redirect users to phishing sites or download further malware.

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://leonvi.ru/wix?keyword=bullet+force+multiplayer+unity PDF link annotation
    • https://cdn.sqhk.co/filodomazora/jiIgia2/voicemeeter_banana_setup_dual_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/vifejoneses/idzBheW/prison_run_and_gun_level_24.pdfIn PDF document text
    • http://tosety.xyz/57411602763a0cxl.pdfIn PDF document text
    • https://cdn.sqhk.co/pafevola/NjfJgj0/expedition_meaning_in_marathi.pdfIn PDF document text
    • http://auth02mobility.com/lg_frp_bypass_2019_apkdgbj8.pdfIn PDF document text
    • https://cdn.sqhk.co/lebuwoxetale/6HNgfja/dejisa.pdfIn PDF document text
    • https://luxabilep.weebly.com/uploads/1/3/0/8/130873941/8ae83.pdfIn PDF document text
    • https://cdn.sqhk.co/pifajaloro/jjE4OKr/vezevivuda.pdfIn PDF document text
    • http://iminn.ru/aprende_ingles_en_7_dias_libroog4dy.pdfIn PDF document text
    • https://cdn.sqhk.co/tewokozogop/Yjghggg/bedivebegatesulepajumedaz.pdfIn PDF document text
    • http://evakuator-uga.ru/ariston_hotpoint_manuale_istruzionidr487.pdfIn PDF document text
    • https://cdn.sqhk.co/jebavimot/geUciec/25986479515.pdfIn PDF document text
    • https://cdn.sqhk.co/javomekoru/MggcOIM/pinata_store_austin.pdfIn PDF document text
    • https://cdn.sqhk.co/turogepufe/ggZTgdu/marshalls_gift_card_discount.pdfIn PDF document text
    • http://autobaff.xyz/btc_full_form_in_payment_mode33vyl.pdfIn PDF document text
    • http://lotto-investclub.com/all_power_rangers_theme_song02zh5.pdfIn PDF document text
    • https://mapivabivex.weebly.com/uploads/1/3/0/7/130776319/vupoxivu_nituxel.pdfIn PDF document text
    • https://cdn.sqhk.co/vekotevudoze/fheqDrM/call_of_duty_warzone_map_size.pdfIn PDF document text
    • http://aydym.club/kaxiriguh7e4.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_off0000c4d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4D1 5136 bytes
SHA-256: c83cfd1b151f36d31fa18e5ec858743ba5b03aae7e66b660ddb105f80a91612a
font_01_sfnt_off0000d641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD641 10716 bytes
SHA-256: dde456ff118c7caa042865b519daf421d64666602bad9488e2fea5967a5f76f5

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