Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab6e70dfac80b337…

MALICIOUS

PDF

79.7 KB Created: 2021-03-23 02:25:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 21ec289d323a2b547ffa1ff7d87b4bf9 SHA-1: bcacd778cfe4b739b06ba14127e0b7fb0a99dc58 SHA-256: ab6e70dfac80b337d1a8d6ea138678cab8ad7d4e4c10828b75fd19921f741a44
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains and link farms, indicating a likely SEO spam or phishing campaign. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://botokaw.ru/award?keyword=carburateur+zenith+pdf PDF link annotation
    • https://cdn.sqhk.co/bevizewo/a9SgcU3/48374362301.pdfIn PDF document text
    • https://teduraxiwerul.weebly.com/uploads/1/3/2/6/132681384/wetisibegixinefo.pdfIn PDF document text
    • https://jojapewabivato.weebly.com/uploads/1/3/1/3/131379205/71050.pdfIn PDF document text
    • http://xunetokawetik.sportsontheweb.net/auxiliares_de_comercio.pdfIn PDF document text
    • https://viforiler.weebly.com/uploads/1/3/0/8/130874197/3588393.pdfIn PDF document text
    • https://cdn.sqhk.co/vawapisoxe/NxijaYo/68307023776.pdfIn PDF document text
    • https://cdn.sqhk.co/lixejudazeza/Ts4mUSG/dining_room_sets_modern_el_dorado.pdfIn PDF document text
    • https://wowaximemufa.weebly.com/uploads/1/3/1/4/131453960/sitiwuju_gawatoja.pdfIn PDF document text
    • http://wudenufodoroziv.scienceontheweb.net/13048695909.pdfIn PDF document text
    • https://cdn.sqhk.co/modesarox/heDmeje/69116442458.pdfIn PDF document text
    • https://cdn.sqhk.co/luveruzosu/3WAjhp0/satizurojiparedi.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/yziikgg/lutejufe.pdfIn PDF document text
    • https://cdn.sqhk.co/vimanagadu/ihihvra/3579966630.pdfIn PDF document text
    • https://cdn.sqhk.co/jabisopomuxo/ebALWxo/2151844819.pdfIn PDF document text
    • https://kevititexozasen.weebly.com/uploads/1/3/2/7/132712545/6f8b18.pdfIn PDF document text
    • https://lepimezuraz.weebly.com/uploads/1/3/4/5/134599896/1692501.pdfIn PDF document text
    • http://lojasamericanasbr.com/imperative_form_italianl734l.pdfIn PDF document text
    • http://fineagencyy.com/husqvarna_55_rancher_parts_usedd3d9g.pdfIn PDF document text
    • http://look-hotel.com/new_call_of_duty_ps4_gamesvaalm.pdfIn PDF document text
    • http://spiritstudio.ru/how_to_change_keyboard_language_on_macbook_shortcutbhm71.pdfIn PDF document text
    • https://pudavupotel.weebly.com/uploads/1/3/5/3/135335197/vekewibotize.pdfIn PDF document text
    • https://sesoguxanijiba.weebly.com/uploads/1/3/5/3/135309487/depidefison.pdfIn PDF document text
    • http://vesajob.getenjoyment.net/adventure_time_card_wars_official_guide.pdfIn PDF document text
    • https://vepemetamat.weebly.com/uploads/1/3/4/3/134354227/704829.pdfIn PDF document text
    • http://tewosube.mypressonline.com/9975084593.pdfIn PDF document text
    • https://nejavedejelije.weebly.com/uploads/1/3/4/3/134336697/5221379.pdfIn PDF document text
    • https://cdn.sqhk.co/bapulofuw/hirIibq/7322223067.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://safedoguno.onlinewebshop.net/social_psychology_elliot_aronson_download.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_off0000f5ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EA 5012 bytes
SHA-256: 8e1c4480f31f9fd8260495c10259afd08c807656da54848eab4472ee8bdefcf2
font_01_sfnt_off000106f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F1 12832 bytes
SHA-256: 9f50cb8e576dff739205ed828030e5ad647f28a31a741bb50b357cabc8376d1c