Malicious PDF — malware analysis report

Static analysis result for SHA-256 c784a0212561bc4c…

MALICIOUS

PDF

82.0 KB Created: 2020-12-10 12:50:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: db2d9902c98c446c56e45309bff2c927 SHA-1: 3bc0aa8f7d870312113cd405e19d35bcdb6689a3 SHA-256: c784a0212561bc4ca2916b42fc506ae308f50c99b373b92d756e31c59170590b
156 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 0.9997

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 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.
  • 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://trafftec.ru/123?utm_term=background+verification+form+16 PDF link annotation
    • https://kavanezeso.weebly.com/uploads/1/3/4/4/134477356/5096902.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374178/normal_5fb97d48ddc89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446015/normal_5faf8248639b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417997/normal_5fc53cba95fe3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386074/normal_5fb546f47e6bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505839/normal_5fad47251f557.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://static1.squarespace.com/static/5fc0f2f6c89e1c4b8fbea157/t/5fc3b127e6d49a06bb032282/1606660391596/71879396354.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf557de18c5c478ef2e68c/1606374782030/bird_rock_yoga_outdoor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25d750ed-05e4-4cbf-babb-9e44da6c4375/vetidobapud.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/nuwavoliziv.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe20bde6d49a06bb5a44da/1606295743026/60226730378.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29c78a32-3359-41f4-ac65-1f8d3c14aea5/dino_hunter_hack_apk_ios.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF434 5392 bytes
SHA-256: 05882f945d53b2b3cb31c87c50650fbe60f2daaf91e69120541a548a3f7f34cd
font_01_sfnt_off00010683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10683 11172 bytes
SHA-256: 0de6750355332b4758cce5f4e4b116c809d6285cb50dc0ac4c92232427c4520b
font_02_sfnt_off00012c9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C9B 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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