Malicious PDF — malware analysis report

Static analysis result for SHA-256 d41f68969b8ae285…

MALICIOUS

PDF

93.2 KB Created: 2021-03-18 00:51:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 97eba7fb9a4cb9d4e5579acae330e568 SHA-1: b0422a719d2282bc9cb2b289d726ac7b96d0e3b2 SHA-256: d41f68969b8ae2859e835a49699fb209306c0166c5f4b5e6a75617338be728dc
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

Heuristics 5

  • 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 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://dugedepap.ru/strik?utm_term=relationship+between+electrical+frequency+and+magnetic+field+speed+for+an+ac+machine PDF link annotation
    • http://prizinsta365.site/dalozumejasubuximesoyncdu.pdfIn PDF document text
    • https://cdn.sqhk.co/sesexibanobu/fD4hbkd/padivofinivurosenavutoku.pdfIn PDF document text
    • https://cdn.sqhk.co/diwomijo/iBTjcmg/draw_around_cellulitis.pdfIn PDF document text
    • https://cdn.sqhk.co/wufotubi/iPifZgg/school_of_dragons_game_download_free_pc.pdfIn PDF document text
    • http://christmas-gift.ru/56495223335h7tiy.pdfIn PDF document text
    • http://fullhp.info/tascam_cd-rw900mkii_for_saleynicp.pdfIn PDF document text
    • https://cdn.sqhk.co/wumerelup/ihgCnig/42212910815.pdfIn PDF document text
    • https://cdn.sqhk.co/sifujubagis/ibjfjbY/93127017680.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392462/normal_601f5332b840d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381082/normal_5fc7a849e2cd3.pdfIn PDF document text
    • http://marketop.club/wapogoxuprv05q.pdfIn PDF document text
    • http://4gusevshop.website/lezusjabvf.pdfIn PDF document text
    • https://cdn.sqhk.co/vivupedasez/gcLngdp/thrift_stores_in_soho.pdfIn PDF document text
    • https://cdn.sqhk.co/kawurefeki/X9jjwia/4349070087.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8b5ac0f3-2bc4-49a6-9a99-2541af31b215.filesusr.com/ugd/f2ef67_9ade212bb59b4e0b8e86d5cb1265c4a0.pdf?index=trueIn PDF document text
    • https://33da92c3-26de-4f6b-bf12-1693cb6a6e79.filesusr.com/ugd/0307f2_a7618dc93c1e454fbdf0a231e190a3cc.pdf?index=trueIn PDF document text
    • https://78e27e65-9996-4239-a63d-7a21722db537.filesusr.com/ugd/03f576_6980ce956ffa4fbd9f66c61076982677.pdf?index=trueIn PDF document text
    • https://2178e3ec-2e0a-46e0-af35-d8a6fdfeb21a.filesusr.com/ugd/c411cf_18a10b9614fb4a5cb12bbeae2f8647ba.pdf?index=trueIn PDF document text
    • https://a8a2d6b8-6248-42a0-90a4-e25e421c2e59.filesusr.com/ugd/f63f29_219b77d0d69e469da1960105a96068e0.pdf?index=trueIn PDF document text
    • https://61249681-e2d1-4375-841a-b3723294d79c.filesusr.com/ugd/3d514e_fffd94e5e5b44ecf91f2362a942abaa7.pdf?index=trueIn PDF document text
    • https://98e80eac-0673-4bf9-a3de-4132461903b3.filesusr.com/ugd/1acd69_826c70e4bc594bd19ac3c851117c9394.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001270e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1270E 6036 bytes
SHA-256: 26d4fe473319285ee9c33f023cec5d62354f87e8778f6581ce2088d5b9d92622
font_01_sfnt_off00013b7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B7E 12704 bytes
SHA-256: 94967f2ce2b71dac7f975ed4ba616ca806362c10d3dddd87b92afe6c729c12d1

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