Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1d9851295940f5e…

MALICIOUS

PDF

72.8 KB Created: 2021-03-06 05:20:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15cdf03f38f7c1c5b10c0e9a055ebfaf SHA-1: 2368c2098d2e93c221f004003bcd80c833e472fe SHA-256: a1d9851295940f5edd12b67b99213c2e369136e152eab44c90e8ae3b3478b4be
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan delivery mechanism. It contains a large number of external links, many of which are obfuscated or lead to potentially malicious domains, suggesting a link farm or redirection scheme. The embedded URLs are likely intended to lead the user to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/aws?utm_term=changing+transmission+drive+belt+cub+cadet+lt1046
    • http://max-lifting.store/free_editable_funeral_program_template_word3bu3e.pdf
    • https://cdn.sqhk.co/gidulikegel/iggfFge/sefalibokuximutuxavipupi.pdf
    • https://cdn.sqhk.co/xunalafugapa/hifin4P/checkers_trading_hours_on_new_year_s_day.pdf
    • https://static.s123-cdn-static.com/uploads/4501503/normal_5ff4bd6ec66ef.pdf
    • https://cdn.sqhk.co/kewawukufiju/cpjaEgg/74429570878.pdf
    • http://wejnpowk.space/detuw2k9t9.pdf
    • https://cdn.sqhk.co/bunewonu/jegfjjc/tezejibavotexol.pdf
    • https://static.s123-cdn-static.com/uploads/4489259/normal_60081ca27fd8b.pdf
    • https://cdn-cms.f-static.net/uploads/4382773/normal_5fd70fcb33270.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://1c514d3f-4aca-4c14-a2cc-94ef866bc6c7.filesusr.com/ugd/860217_7effa7de6c3f4a2ab0f01e44c678c966.pdf?index=true
    • https://6f847715-c85a-45d9-ae5c-7c68cc800588.filesusr.com/ugd/6e100b_5837afcace6a4d2db76e92ea3d33e0d2.pdf?index=true
    • https://11484d69-1612-41b9-9199-165df1f08223.filesusr.com/ugd/e2f197_640663a58e5245c3b9ae88a2969198c7.pdf?index=true
    • https://60f6da8c-824c-4163-aae9-6195f2ac7ed4.filesusr.com/ugd/7f16bd_578665168eb4412aac57dddd98ba9fea.pdf?index=true
    • https://bad3f395-1638-4667-b349-d6f934eeab49.filesusr.com/ugd/ed2d23_155efaad3ae8489599f34e223748fda1.pdf?index=true
    • https://s3.amazonaws.com/kabisebax/50715994388.pdf
    • https://790985df-dfec-4a08-b509-00f37668cf87.filesusr.com/ugd/a421e3_ca87662d6c724def9a140b07d7a857a9.pdf?index=true
    • https://9d3edb37-11ce-4d87-b861-4f8d850d55a0.filesusr.com/ugd/0d2aa0_dca8fe35dd03417ab62a37705ca23079.pdf?index=true
    • https://s3.amazonaws.com/febopa/5448821435.pdf
    • https://s3.amazonaws.com/wajibile/yellowfin_tuna_price_per_pound_2018.pdf
    • https://502f924d-676a-41b3-8220-87c01882f600.filesusr.com/ugd/5a20bb_73af7a9f607e467b8b5f06fc09c3ee21.pdf?index=true
    • https://28ed73df-463f-41d7-bc87-4635118fd8e0.filesusr.com/ugd/74acc8_9f2c7b58e827453a8ec63b9c09518914.pdf?index=true
    • 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_off0000de9d.bin
b015cedc85cdb0afbd8d7e4caafb94b9d2ac003bcfcec442a64affcedbb79485		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9D 5896 bytes
font_01_sfnt_off0000f28b.bin
582fceb58f332859e6bd932ccefe7d98aaea019ba8df729234034607016caaea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF28B 10292 bytes

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