Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce1ce01ca31d87aa…

MALICIOUS

PDF

78.8 KB Created: 2021-03-07 17:02:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d5d931dbdf75ed71e33681b8cfb5850e SHA-1: 5b94a2e28dda0d55931c361e98e60a3b296e8c0a SHA-256: ce1ce01ca31d87aabb624ac8987e94079d3c5355ac7bdd377294b868da7278bb
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 0.9995

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://resalured.ru/strik?utm_term=2000+chevy+silverado+1500+trailer+wiring+diagram PDF link annotation
    • https://cdn.sqhk.co/mevutaxisut/fBIibai/video_ringtone_app_for_android_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423428/normal_5ff2e5ae7c59f.pdfIn PDF document text
    • https://cdn.sqhk.co/jujifefa/7hai6G7/10553327739.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/jbgj3ib/fallout_shelter_ps4_cheats_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417403/normal_6002c183a8728.pdfIn PDF document text
    • https://dugaposiga.weebly.com/uploads/1/3/4/8/134857723/misoferija.pdfIn PDF document text
    • https://pasezarovatif.weebly.com/uploads/1/3/4/8/134858127/zevafimi.pdfIn PDF document text
    • https://xobawaxotax.weebly.com/uploads/1/3/1/4/131453143/4487628.pdfIn PDF document text
    • https://zatozidebowetam.weebly.com/uploads/1/3/1/3/131398213/nelemad-zomomutovo-pizebapobiri-zivabibupeteviw.pdfIn PDF document text
    • https://guxuxexor.weebly.com/uploads/1/3/0/7/130775085/pegukakos_jetesuwawaz_ximumawexusu.pdfIn PDF document text
    • https://luwusimoxoxaxa.weebly.com/uploads/1/3/1/4/131453453/rugaxekumuru.pdfIn PDF document text
    • http://reduslim-officialsite.site/how_long_to_use_vicks_steam_inhalerua458.pdfIn PDF document text
    • https://disaximineta.weebly.com/uploads/1/3/4/8/134883765/402067.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375086/normal_5fcc2f0267644.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408352/normal_6021502b13c1a.pdfIn PDF document text
    • http://masterpowerpoint.com/62761516695mgfv0.pdfIn PDF document text
    • http://triple-doska5.club/520211414340a29p.pdfIn PDF document text
    • https://cdn.sqhk.co/sugezigo/iihOAIl/12358521252.pdfIn PDF document text
    • https://cdn.sqhk.co/noloxunipe/1eiigii/king_hearts_queen_of_spades.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/introduction_paragraph_worksheet_high_school.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/how_to_remove_needle_jet_from_mikuni_carb.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_off0000f5eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EB 5960 bytes
SHA-256: 23f3d646bfb71bd7369c164744aaaf9fa843688313f597731a71ebc6ff7192c5
font_01_sfnt_off00010a33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A33 10432 bytes
SHA-256: 27a5ea13bea335f3fab3890e9fbb72c562e80912a954b05f9046964ecd6077a2

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