Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6b012bd18ad15f7…

MALICIOUS

PDF

65.7 KB Created: 2021-01-17 03:12:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 76c8b55c5a05daa4c1c799aef6dd2d8e SHA-1: 121c831a21b018d07e10da5716f64c2bdd0a7277 SHA-256: f6b012bd18ad15f7fcc48d2426704b7d100727aef87f82fb4a0d938b97b8e191
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of external links, many of which point to other PDF files, suggesting a link farm designed to manipulate search engine results or distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URL 'https://trafftec.ru/123?utm_term=element+24+inch+flat+screen+tv' is the primary indicator of a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=element+24+inch+flat+screen+tv PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366337/normal_5f875ec640b75.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382962/normal_5fc8dca75d983.pdfIn PDF document text
    • https://site-1244713.mozfiles.com/files/1244713/door_lock_2018_movie.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470833/normal_5fad4bff0d224.pdfIn PDF document text
    • https://fategebedabeno.weebly.com/uploads/1/3/4/7/134718848/lanezo_xusuxuguwikati_raroviz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474169/normal_5fcfeb721952f.pdfIn PDF document text
    • https://pumutetigowon.weebly.com/uploads/1/3/4/6/134699291/45c5590049e50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483070/normal_5fdabcd22492b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489732/normal_5fe95516b8d2a.pdfIn PDF document text
    • https://site-1175626.mozfiles.com/files/1175626/71601742517.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469617/normal_5fe864dd8b479.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/rurosaveruk/lagevakagimeraguwojiwi.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/43384113747.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/belelosejazevanigizo.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC356 5356 bytes
SHA-256: 199a697f81330cff8505c48643c12eab5f06a3684987f149e0ef9e1323d12be2
font_01_sfnt_off0000d577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD577 10824 bytes
SHA-256: 5c1b5ccd7d55c7ec5cfbf599c3b237b67488d38ec4ff711cc4de9109629af5b4

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