Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cadd49f8f718c8b…

MALICIOUS

PDF

80.0 KB Created: 2021-03-22 00:57:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e1ae2cbe336095707a8c129b74329e0b SHA-1: 3b560d08ced2f97713b52a6c281c43f1bfbcc3fc SHA-256: 2cadd49f8f718c8b6fcac974858c860209f15126784c91962b72cd8e373c601d
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 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://nipisod.ru/strik?utm_term=what+is+the+book+daisy+miller+about PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384164/normal_5fd2420e7a2a5.pdfIn PDF document text
    • https://cdn.sqhk.co/gorisaburo/ieicjgE/bubble_boy_poker_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/nilamemiw/kJiecVp/animals_names_and_sounds_in_english.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371787/normal_5ff276d8e21ea.pdfIn PDF document text
    • http://xonejalevesezom.sportsontheweb.net/cast_of_power_book_iii_raising_kanan_premiere_date.pdfIn PDF document text
    • http://xadazobisisim.scienceontheweb.net/air_pollution_control_techniques.pdfIn PDF document text
    • https://cdn.sqhk.co/jesovolavig/Fiighii/3432319524.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwasokeg/Yp4hfgj/pac-_man_games_at_walmart.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kevava/39514058236.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/pufedesufazisetibavej.pdfIn PDF document text
    • https://ac4cd5cf-e861-4b1b-a585-e47049f737a6.filesusr.com/ugd/843280_f95549e645a94ba3ae0eef1175877834.pdf?index=trueIn PDF document text
    • https://2a1457bb-a4d2-449b-8914-d784a503a6da.filesusr.com/ugd/c0fca2_823294fa001d43b8a155a30bdd323435.pdf?index=trueIn PDF document text
    • https://044ec7df-721b-4788-b209-87474a3fcb06.filesusr.com/ugd/60ffa2_e24c53a732f64416ac99803d0d0a9418.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/lodutobuwoxidok.pdfIn PDF document text
    • https://75ca6b5e-a470-4e0e-8004-b00a9f1721b4.filesusr.com/ugd/1e4819_70d07a92be2441b08d230d633d1ed3fb.pdf?index=trueIn PDF document text
    • https://b3d988c2-7a7d-4c3c-9141-221b6550481e.filesusr.com/ugd/9dda13_2634279e1433489cb6ef869df08a66c0.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eeeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEB 5160 bytes
SHA-256: 72b4db95f71acc8576642e54013ddf5999a277a838717dfb1ad6ae29f88e6c6e
font_01_sfnt_off0001007f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007F 10820 bytes
SHA-256: 774f2f06fcde048717b585f9d7231b9019ac1c97007df36fc7c8ed056b9b3281
font_02_sfnt_off00012517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12517 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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