Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce38c87839c82198…

MALICIOUS

PDF

68.2 KB Created: 2021-04-07 08:33:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: c019430c9658ddfa083ce684a58c183e SHA-1: 3843cc67282b08b6b66aa412b3a9003a4d920be8 SHA-256: ce38c87839c82198b073447f533732d9d53cae5326ffb721de9909e4de418a6b
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a high-confidence ML classifier and ClamAV detection indicating malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests it's part of a link farm designed to obscure malicious destinations. The primary malicious URL identified is https://lozipotod.ru/wix?keyword=guns+germs+and+steel+conquest+worksheet, which is likely used for phishing or to serve a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://lozipotod.ru/wix?keyword=guns+germs+and+steel+conquest+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4471686/normal_5fdc159338892.pdfIn PDF document text
    • http://numberoone.xyz/16292207493q640c.pdfIn PDF document text
    • http://jopagozopive.medianewsonline.com/kibasopomazugomozidawejul.pdfIn PDF document text
    • http://antinomi.design/how_do_i_get_a_voided_check_from_chasesl4v4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444378/normal_60666baa88883.pdfIn PDF document text
    • http://zitupow.medianewsonline.com/biography_project_template.pdfIn PDF document text
    • http://mihetos.xyz/sodulukakogetebodv0tp1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411926/normal_6001b8a25c1cc.pdfIn PDF document text
    • http://pravagims.net/fenaliseguze0e5uh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448345/normal_601d5aefe1638.pdfIn PDF document text
    • http://wotidoteked.mywebcommunity.org/gesowusolasezusebotivipi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478415/normal_605a6a38d8081.pdfIn PDF document text
    • http://titanof-filtr.ru/how_to_read_architectural_drawings_uk3xwc6.pdfIn PDF document text
    • http://doctora.club/brother_dcp-_l2520dw_service_manual11qcc.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/bubeto/hp_lj_pro_400_m451dn_toner.pdfIn PDF document text
    • http://tososite.onlinewebshop.net/nafobinubepunata.pdfIn PDF document text
    • https://1347de4c-4e54-429a-b84c-372e60bc5a2b.filesusr.com/ugd/6c98bc_1827820a543c46169467952422a89bcf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/powerpoint_template_free_creative.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/simple_register_form_template.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/vusogejo.pdfIn PDF document text
    • https://11f44e1d-c86f-4be6-baa1-90970e7c24f5.filesusr.com/ugd/a298ce_394b487a720445e8bb17bc6df654a53e.pdf?index=trueIn PDF document text
    • https://8e12fe21-47c1-448c-af9e-883e7c84523b.filesusr.com/ugd/52ac5e_eba9d7dc174146f09b3ea96a6805e423.pdf?index=trueIn PDF document text
    • https://cff07a16-13b2-455b-8a78-148a75b158b4.filesusr.com/ugd/cda0c7_011ca3e64bf34c238e71141a6b0fd5ea.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD19 5668 bytes
SHA-256: 98f06a73f985d52fe32df3ba38be93e261a8c64549618a5105c8853fae4e9cb2
font_01_sfnt_off0000e03d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03D 10184 bytes
SHA-256: d12be576c1e0c2130a12f6262f6db08529c45976e85d205f84270e283d000cc1

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