Malicious PDF — malware analysis report

Static analysis result for SHA-256 3245b4c92d1cac95…

MALICIOUS

PDF

71.9 KB Created: 2020-12-11 13:56:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 96b4aca468b9e8496082ece32a28eae7 SHA-1: 93a0a96072cd6dbcd8c8d365357ee0f4a5bb9d07 SHA-256: 3245b4c92d1cac95cd4521a2a772b8c36dd0a6236e3306f2d8fb9a4865401f14
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 0.9997

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://trafftec.ru/aws?utm_term=bollywood+audio+songs+free++high+quality PDF link annotation
    • https://nafizanoride.weebly.com/uploads/1/3/4/5/134596231/84c31.pdfIn PDF document text
    • https://naketutetan.weebly.com/uploads/1/3/4/6/134660231/sufulaj-sowozepun-timifepolob-febomexuku.pdfIn PDF document text
    • https://mubuzetuwifo.weebly.com/uploads/1/3/4/7/134703000/matawawubasinup-nadawatu-sodorosofuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369486/normal_5f887fd22179b.pdfIn PDF document text
    • https://gobumireg.weebly.com/uploads/1/3/1/3/131383916/lixot_riniborovaza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381546/normal_5f9bfc6b7cf76.pdfIn PDF document text
    • https://lifezubolafa.weebly.com/uploads/1/3/4/7/134715310/2620878.pdfIn PDF document text
    • https://fisizupesaxog.weebly.com/uploads/1/3/1/6/131636899/diseresuwu_xigotuvewadidu_wujifise.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450347/normal_5fa8100c16d48.pdfIn PDF document text
    • https://lasomuvexovip.weebly.com/uploads/1/3/0/8/130813571/5339650.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477626/normal_5fcacb947ce52.pdfIn PDF document text
    • https://gerexogevi.weebly.com/uploads/1/3/4/4/134463414/3866ec0c592781.pdfIn PDF document text
    • https://zejibafubetu.weebly.com/uploads/1/3/4/1/134108860/zugen.pdfIn PDF document text
    • https://jerezuwiwufuken.weebly.com/uploads/1/3/4/3/134355676/1094467.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
    • 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_off0000ce1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE1A 5420 bytes
SHA-256: e2f3b339271f140b0f70492498d7b02ce9e92f25b4a66bb8801ab2188006c40e
font_01_sfnt_off0000e08e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08E 10432 bytes
SHA-256: 628557074b8e7d13bcf5435827c911685ba73a7ec6bc46cafbf60f1ca084cd8b
font_02_sfnt_off0001041f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041F 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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