Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e662b284dbe8fce…

MALICIOUS

PDF

79.2 KB Created: 2021-03-11 19:41:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81889629c6c4447fae3201172d867130 SHA-1: 76efd15116476b60d61482012d88bd52166521b7 SHA-256: 0e662b284dbe8fce97c3a3220e5c4fa9a51175fadcb3b8572412a7c5c545ae4b
156 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm or phishing lure, containing numerous external links to other PDF documents hosted on various domains. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs suggests an attempt to redirect users to potentially malicious content, possibly for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/award?keyword=polycythemia+causes+pdf
    • https://nosisakapu.weebly.com/uploads/1/3/4/7/134773138/sulizufama_zawib_mexaruneji.pdf
    • https://cdn-cms.f-static.net/uploads/4426810/normal_5fd86ab7abbec.pdf
    • https://cdn.sqhk.co/dulinifijal/mM0e7ie/brasfoot_2020_download_apk.pdf
    • https://jutovadisew.weebly.com/uploads/1/3/4/7/134720627/zodojobodido-xelilu-zumano-daledo.pdf
    • https://lutaxebibutemun.weebly.com/uploads/1/3/1/3/131380730/lojanofigixus.pdf
    • https://cdn.sqhk.co/pogadidotilu/Kgihihh/mens_light_up_christmas_jumpers_2019.pdf
    • https://rixikevepu.weebly.com/uploads/1/3/1/4/131408169/2846a881537d8.pdf
    • https://dagigokes.weebly.com/uploads/1/3/0/7/130739756/penokemu-dojevawubuva-zidopabimu-xupuli.pdf
    • https://kufidadifijerid.weebly.com/uploads/1/3/1/4/131407945/8680267.pdf
    • http://sofofetaletome.22web.org/konosuba_light_novel_animesuki.pdf
    • https://cdn-cms.f-static.net/uploads/4387417/normal_60186a262a81b.pdf
    • https://cdn.sqhk.co/waxobakal/8ha1idi/55798673837.pdf
    • https://cdn.sqhk.co/sawitofi/fifNjdX/mortal_kombat_11_ultimate_ps4_physical_copy.pdf
    • https://cdn.sqhk.co/jigugabopu/jfzxwz5/sikigurifomivakixuwozas.pdf
    • https://bisodipodur.weebly.com/uploads/1/3/4/5/134592442/pobilewu-pamejated-pevigupatusi.pdf
    • https://pesuzipowezav.weebly.com/uploads/1/3/1/6/131636843/kakosum.pdf
    • https://jenejipita.weebly.com/uploads/1/3/4/4/134473981/2501687.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ba64f73a-b3d6-4b94-8590-4947066cc862/guxusowikug.pdf
    • https://uploads.strikinglycdn.com/files/34545c9e-7dcb-4589-b6dd-bf93696fb44b/31096650104.pdf
    • http://wajiletum.epizy.com/wow_rogue_leveling_guide_classic.pdf
    • http://jabepujun.epizy.com/batching_plant.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9f4.bin
e09ea56a0e502e7305f580ae172f10884dc5b662d6d207c89f681784a9e6f161		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F4 5404 bytes
font_01_sfnt_off00010c3b.bin
7e6276c5861a4500109f3db451bb7be8473fcefb6e865acd150c8e065c6e87b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C3B 10292 bytes

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