Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3f114d0bfdd27c6…

MALICIOUS

PDF

67.7 KB Created: 2020-12-19 23:23:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a6f85cc33c4c9053393ad640a86b0f1e SHA-1: 1cc9e19e776e47376f764d04c4fafec129ac0184 SHA-256: f3f114d0bfdd27c68a1e11f4536e0d24c214b47dc04c0a62a0287234ba315a6d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a heuristic firing for a link farm, indicating an attempt to redirect users to multiple external sites. One of the primary URLs points to a domain associated with distributing SEO-optimized PDFs, suggesting a phishing or malware distribution scheme. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of this document.

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 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://traffset.ru/aws?utm_term=self+care+adalah+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408195/normal_5f9ba9e848041.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450249/normal_5fc683d2bd8e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445341/normal_5fd274057f336.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452607/normal_5fbe348da2e80.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/7349474.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473322/normal_5fb5b0e1273a3.pdfIn PDF document text
    • https://pikoxujedogusu.weebly.com/uploads/1/3/4/6/134665618/runifag.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/bezutu/city_of_longmont_recreation.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc392926b97992eb56ca04e/t/5fcbaa5b33fb14715cc05700/1607182939614/dogeduwatoli.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc529a5bd14ff0dd2b8563d/t/5fd14c99e85d702eca0daedb/1607552154858/boku_online_anmeldung.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/052c2391-3923-4e51-be85-fb1445c3c2f8/kikit.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/42704487757.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 1

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_off0000ce1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE1D 5168 bytes
SHA-256: d5c407c0bbd0f4e5f35c95a09a0f9d1e690eccc24739f7c86e3fb6cdad2bf839
font_01_sfnt_off0000dfb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB2 10116 bytes
SHA-256: 0a0a6740c27676572eb661e7be942fc4025cabc3c947ba49e0fbbc8f6014092e

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