Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6fe60cf9e4c2153…

MALICIOUS

PDF

83.7 KB Created: 2021-02-22 03:33:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e2ae1680ff0bd75d2f76a7d3dda8acf6 SHA-1: 6549a1c1befbd2a2e36e034f0049ce5f8487e383 SHA-256: d6fe60cf9e4c21534057607ec53ebee9dede5d0faf9995eebe9025d1697f7f9f
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, with many pointing to disposable hosting services. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://jottigo.ru/strik?utm_term=jual+samsung+jitterbug PDF link annotation
    • https://cdn.sqhk.co/lebapivi/BBjdhal/43053592323.pdfIn PDF document text
    • https://nivunosanogerog.weebly.com/uploads/1/3/4/5/134516177/6931274.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483873/normal_5fde9f5d2f8b2.pdfIn PDF document text
    • https://cdn.sqhk.co/fawabanof/hjjjiiq/83735275985.pdfIn PDF document text
    • https://cdn.sqhk.co/vorebilifi/oiiduss/best_trail_hiking_shoes_uk.pdfIn PDF document text
    • https://nujetamewude.weebly.com/uploads/1/3/4/8/134881912/liwofuzuligaxa.pdfIn PDF document text
    • https://dakijixubuleze.weebly.com/uploads/1/3/0/7/130740496/bolonivuvo.pdfIn PDF document text
    • https://tidosivapozagul.weebly.com/uploads/1/3/4/3/134390518/gesevojitafovekux.pdfIn PDF document text
    • https://fanazogi.weebly.com/uploads/1/3/0/9/130969494/vapoxawakimejum.pdfIn PDF document text
    • https://tivufotevomok.weebly.com/uploads/1/3/2/6/132682035/9938893aadc65.pdfIn PDF document text
    • https://wugupuvexiso.weebly.com/uploads/1/3/0/9/130969254/medobupiruwul-vubuzizonelo.pdfIn PDF document text
    • http://nefuwumimo.iblogger.org/daxajuwivutibolaboxovit.pdfIn PDF document text
    • https://jopazidavasuzu.weebly.com/uploads/1/3/2/6/132681438/wetodazox-mulukikowesoxer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454435/normal_6031552c3818a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://giratas.epizy.com/puredafefutorodefob.pdfIn PDF document text
    • http://pegesij.rf.gd/rakovokonun.pdfIn PDF document text
    • http://xusixuxoribixe.rf.gd/check_radio_button_checked_or_not_android.pdfIn PDF document text
    • http://xuxusemo.epizy.com/hardy_weinberg_equilibrium_problems_worksheet_answers.pdfIn PDF document text
    • http://wokoguzesel.rf.gd/amreli_steel_annual_report_2014.pdfIn PDF document text
    • http://kikidexawudipox.epizy.com/15830327832.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_off00010a23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A23 5212 bytes
SHA-256: 822768b078a4df532f22d4d5abdf11bc2939e79661be4e05fc282297758d5127
font_01_sfnt_off00011bc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC8 11144 bytes
SHA-256: 1d5fbdae27fbe8b079982fe14299e0a2ed7a5e5d0a28c1808d6c11bb4ccb9f92

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