Malicious PDF — malware analysis report

Static analysis result for SHA-256 7832855705f60585…

MALICIOUS

PDF

91.8 KB Created: 2021-04-02 20:46:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ddf23618267485daa7123f2ebe43bb72 SHA-1: 83d97248b01d88d13630b38f548a99599e36ae8f SHA-256: 7832855705f6058550540f04466102b8b0ff4625fa172ab3010ba71c47194316
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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/strik?utm_term=how+to+turn+off+a+first+alert+smoke+alarm PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4462775/normal_5ff9b14883363.pdfIn PDF document text
    • https://cdn.sqhk.co/gejupajo/hgjjamY/80189903407.pdfIn PDF document text
    • http://bowuvudofi.scienceontheweb.net/ncert_english_grammar_book_for_class_4.pdfIn PDF document text
    • https://cdn.sqhk.co/vapitinab/XBAhShh/evolutionary_theory_of_emotion.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412763/normal_5fcdf938122a4.pdfIn PDF document text
    • http://josumewemuzob.getenjoyment.net/dribble_drive_offense_drills.pdfIn PDF document text
    • http://gijokamamijole.iblogger.org/crash_bandicoot_3_descargar_para_android.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459640/normal_5fdf6579b4ffb.pdfIn PDF document text
    • http://netezasodi.22web.org/biblia_nvi_descargar.pdfIn PDF document text
    • http://golixudib.mypressonline.com/67362026170.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/nuvukaxogudadoloseveropis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366048/normal_600fbd0c835af.pdfIn PDF document text
    • https://cdn.sqhk.co/kedetofido/Of9hcjf/54320285204.pdfIn PDF document text
    • https://cdn.sqhk.co/savunowudob/w9iahcQ/60896883379.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://23da7c74-6e14-424a-b22a-901aa35eafb1.filesusr.com/ugd/9cc572_ecdcdc7665d84996bf98238228d98542.pdf?index=trueIn PDF document text
    • http://vugugemo.atwebpages.com/canon_mg3500_manual_download.pdfIn PDF document text
    • https://52c77544-2eb8-427c-ad0e-a8a7e2ea9366.filesusr.com/ugd/93288f_6689a2e714f54b82bd45a81f0087f237.pdf?index=trueIn PDF document text
    • https://87b84290-c0b3-4c73-97a1-3d59c64c3f69.filesusr.com/ugd/c638b7_e20af782c0744dd7987eb5a2ac147e75.pdf?index=trueIn PDF document text
    • https://e1d5fa5a-667c-4d22-bb72-2ec96b4ed0f7.filesusr.com/ugd/01f30d_833b90bede7d4a67ab59e9058e277744.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_off00012a58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A58 5032 bytes
SHA-256: 6dcecce93820e2525a3219a41e422c1b75387ac17be31e66ce5c561f7eb6c885
font_01_sfnt_off00013b6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B6B 10804 bytes
SHA-256: 713fb430190cf7ed1fd4671a26bee4cb3414bb2b37d262d8002de7b1afc1f64c

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