Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e355967c76f9ba9…

MALICIOUS

PDF

69.3 KB Created: 2020-12-18 14:01:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: cc140e4099520286c6e950527d01f885 SHA-1: b63f7f7cc292625da778e02125ac1e354b8804a3 SHA-256: 4e355967c76f9ba9ccebcc832b7702d44452fe74dad1a442ed26f5cfdf1dfca8
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document is classified as malicious, primarily due to its extensive use of link farms pointing to potentially malicious redirectors and disposable hosting. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to 'traffmen.ru', indicating a redirection to malicious infrastructure. The document's structure suggests it's designed to host a large number of external links, likely for phishing or to distribute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/aws?utm_term=r+u+ok+day+poster In PDF document text
    • https://jitebemaduk.weebly.com/uploads/1/3/4/6/134692965/zulojomova.pdfIn PDF document text
    • https://dirojobadenanew.weebly.com/uploads/1/3/4/1/134109317/mewam.pdfIn PDF document text
    • https://vaxuziboz.weebly.com/uploads/1/3/4/6/134695811/nelodusepobutimuzit.pdfIn PDF document text
    • https://tajuzoliv.weebly.com/uploads/1/3/4/3/134359899/4a442.pdfIn PDF document text
    • https://wixotavu.weebly.com/uploads/1/3/4/7/134764887/9635579.pdfIn PDF document text
    • https://xexovelez.weebly.com/uploads/1/3/0/8/130813416/nutojugun.pdfIn PDF document text
    • https://nudabubi.weebly.com/uploads/1/3/4/3/134323665/wewufivo.pdfIn PDF document text
    • https://ravadekivis.weebly.com/uploads/1/3/4/5/134512786/julusaxekoxusudok.pdfIn PDF document text
    • https://vunatoja.weebly.com/uploads/1/3/0/7/130738644/butumi_deduvanas_koraxatabis_luzedeniwimafu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416331/normal_5fbf5f0b5138e.pdfIn PDF document text
    • https://mijisurux.weebly.com/uploads/1/3/1/0/131070147/3053479.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0e15d7d0c8f249d40b1da/t/5fc3288a5147b148049a5d1c/1606625418539/master_halco_fence.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/escape_alcatraz_game_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffb332bbd740658015355/t/5fc0e25deaf37e3b64bc6c8f/1606476382831/siwaniberusu.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/probability_and_statistics_notes_anna_university.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf372fa04221c71e5febb/1606284146992/35198834456.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_off0000d24a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD24A 5092 bytes
SHA-256: 6b572f47f084b6d77132fa3df5296016539d8d2fd91f56d8bff04974c658ddbb
font_01_sfnt_off0000e3bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BB 10796 bytes
SHA-256: 782b6a36f943d9aee85bd418ae0923192d0d60407365d494e1103b8e75755a82

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