Malicious PDF — malware analysis report

Static analysis result for SHA-256 7de3cca9a7f7fb74…

MALICIOUS

PDF

78.8 KB Created: 2021-04-13 06:48:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2aeb9f894f51c9ba667b8dbe021ff88d SHA-1: 9cca9567a5a20eeb5f701e9759dfdaf5210d8580 SHA-256: 7de3cca9a7f7fb742041abf69ae6f32bb4ed2f5a59584b5761ed1242d4d30983
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=paintball+supply+shop+near+me PDF link annotation
    • https://mulaxenowaw.weebly.com/uploads/1/3/4/8/134862071/99f31697.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376380/normal_5ff2518b8c169.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/Coljfza/20686375296.pdfIn PDF document text
    • http://mugedly.xyz/61110729773u0avn.pdfIn PDF document text
    • https://cdn.sqhk.co/duloputemab/ijciidx/mupovuporiligok.pdfIn PDF document text
    • https://cdn.sqhk.co/nakolore/gfxig33/download_turbo_racing_league_hack_game_apk.pdfIn PDF document text
    • https://vulabomanuxuw.weebly.com/uploads/1/3/4/8/134857085/lapopi-sirulunavar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392451/normal_603236e03799d.pdfIn PDF document text
    • https://pimotaro.weebly.com/uploads/1/3/3/9/133986821/1857897.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426072/normal_60488b3fce452.pdfIn PDF document text
    • http://getyourcredit.info/aristotle_happiness2i3j9.pdfIn PDF document text
    • https://tebozelekunoton.weebly.com/uploads/1/3/1/4/131453588/550354.pdfIn PDF document text
    • https://fuxarudoniw.weebly.com/uploads/1/3/5/3/135350341/681100.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495685/normal_5fcc21355431a.pdfIn PDF document text
    • https://xediziku.weebly.com/uploads/1/3/1/3/131384396/6285796.pdfIn PDF document text
    • https://botiwugagow.weebly.com/uploads/1/3/1/8/131872238/f8acc0385.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/xakapudakadu/piano_sheet_music_for_hallelujah_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/dajirukojelepexisi.pdfIn 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_off0000f5a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A8 5300 bytes
SHA-256: 1822adda827ad615b818eeec40c0cb599f85f129714903592683d99e74a51366
font_01_sfnt_off00010784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10784 11416 bytes
SHA-256: 574b004b4fc81de3620e260ae49bd58dc4a1a0cfb15fd39c0094dd499db14b09

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