Malicious PDF — malware analysis report

Static analysis result for SHA-256 7758501fdb72a761…

MALICIOUS

PDF

74.0 KB Created: 2021-02-28 16:47:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 5b76c6910ee99f28560db75ea5611427 SHA-1: f1285e496b5462cf303d7d1a387eb7cf5d3f3700 SHA-256: 7758501fdb72a76138b0ee70b268f148dde9e5a56f375d5c99e55e243192ca19
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggest the document's primary purpose is to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

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 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://pelibifir.ru/strik?utm_term=troy+bilt+mower+belt+replacement PDF link annotation
    • https://dolepaxutafajur.weebly.com/uploads/1/3/0/9/130969408/bewazasebuvuro_rekemem.pdfIn PDF document text
    • https://wexivupesowapab.weebly.com/uploads/1/3/2/7/132712225/tezebugoka.pdfIn PDF document text
    • http://lokubakodo.getenjoyment.net/85126464386.pdfIn PDF document text
    • http://ogranicbio.space/mi_home_security_camera_360_manuale_italiano0s7ta.pdfIn PDF document text
    • http://idealica-uficiale.website/wazuzomibetanuvobad3gjq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387417/normal_603a99e31c8af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369182/normal_602087a862832.pdfIn PDF document text
    • http://raxuzasi.iblogger.org/72705213949.pdfIn PDF document text
    • http://joguxujeganu.iblogger.org/cool_phone_wallpapers.pdfIn PDF document text
    • https://laregokirula.weebly.com/uploads/1/3/0/9/130969776/7f537443d9.pdfIn PDF document text
    • https://seguvixezamab.weebly.com/uploads/1/3/5/9/135961197/bumabipunisojuw-zisixiwufe.pdfIn PDF document text
    • http://gopuderolan.iblogger.org/jesumiwinunazavos.pdfIn PDF document text
    • http://lorewipa.scienceontheweb.net/can_you_whitewash_wood_floors.pdfIn PDF document text
    • http://vashe-zdorovie.xyz/kokia_fukurou_sheet_music58qc8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447662/normal_5fee0b9be088b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zewogukanonudut.epizy.com/abhishek_bachchan_new_movie_songs.pdfIn PDF document text
    • http://zerozuru.epizy.com/livukodibobavusujawe.pdfIn PDF document text
    • http://gazunobopa.epizy.com/49293640060.pdfIn PDF document text
    • http://nukilaba.myartsonline.com/pefofej.pdfIn PDF document text
    • http://xefesogojodegu.epizy.com/5159043449.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_off0000e6ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AC 5184 bytes
SHA-256: b2ccc7a1f9289cc0694a670460dfff52a52acb79a397fadbd34a1be6e3a08bac
font_01_sfnt_off0000f84c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84C 10088 bytes
SHA-256: f5e8f333e7a9e5bb3ea8fa48f0f11b10e159d5f44e3b7b59e0b2db05490bd8f9

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