Malicious PDF — malware analysis report

Static analysis result for SHA-256 59a36b4006dbadf0…

MALICIOUS

PDF

77.2 KB Created: 2021-05-15 05:16:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: a79b9fb25562e0180229f46f70db039d SHA-1: 09ef5d1927578151e1dabaabde460d31d38ad13f SHA-256: 59a36b4006dbadf08a63c0bc49c45ee7110ad2e10c12d46064f74ceab4c801ce
186 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to various external websites, masquerading as search results for product dimensions. The presence of numerous external links and the use of disposable hosting services indicate a malicious intent to drive traffic to potentially harmful sites. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing or trojan variant.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/strik?utm_term=what+are+the+dimensions+of+a+55+inch+samsung+smart+tv PDF link annotation
    • https://lokulubebu.weebly.com/uploads/1/3/1/8/131856352/3f79f4381a83ad9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494435/normal_600d41eb8b55f.pdfIn PDF document text
    • https://kegadurab.weebly.com/uploads/1/3/4/0/134096735/lolatalolupijabukave.pdfIn PDF document text
    • https://xonimitofowe.weebly.com/uploads/1/3/2/6/132682232/5536405.pdfIn PDF document text
    • https://fakozopaximubod.weebly.com/uploads/1/3/1/4/131453484/b0977.pdfIn PDF document text
    • https://vugosolisaxude.weebly.com/uploads/1/3/2/8/132814967/juzames.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384472/normal_60035f3e28ec3.pdfIn PDF document text
    • https://gosevitugelaw.weebly.com/uploads/1/3/4/4/134439416/1b7e7ac4355.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475989/normal_6061e80e6520f.pdfIn PDF document text
    • http://rukafuxofi.iblogger.org/arrancame_la_vida_completo.pdfIn PDF document text
    • http://sawotawigusewon.22web.org/guided_meditation_for_stress_script.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454808/normal_601ffc2515323.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424996/normal_6066afc9a2e1c.pdfIn PDF document text
    • https://jufavufopu.weebly.com/uploads/1/3/4/3/134340263/5070d78f6b7e312.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/gawabog/87293103628.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/jinigudabobujagapak.pdfIn PDF document text
    • http://tusibav.epizy.com/47755942323.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/intermediate_directions_social_studies_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/bissell_proheat_pet_advanced_full-size_carpet_cleaner_1799_belt.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_off0000f016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF016 5600 bytes
SHA-256: c8b9ca1e98eabb2b11541ca304c350d5a1bceb1050069670373b1563d68fbcde
font_01_sfnt_off0001030e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1030E 10640 bytes
SHA-256: eaab2fc3351b280ccf70f8f75d35b344940d6e36d0698e14697bed36800e71b0

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