Malicious PDF — malware analysis report

Static analysis result for SHA-256 e55287a35ecc79fd…

MALICIOUS

PDF

76.0 KB Created: 2021-04-05 22:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 00cc7876bc02fcdc13923441c8848994 SHA-1: 3d47419f75da7c7208f21650c4a0e2d3d9da37a2 SHA-256: e55287a35ecc79fd7fb78f66b9f51b13cb79121b203026c5c322b3ead7427a59
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The primary URL observed is https://xezojetit.ru/strik?utm_term=are+2008+ford+escapes+good+cars, which is likely part of a campaign to redirect users to malicious content or phishing pages.

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://xezojetit.ru/strik?utm_term=are+2008+ford+escapes+good+cars PDF link annotation
    • http://dobujebenebif.66ghz.com/plague_inc_hacked_apk_android.pdfIn PDF document text
    • http://napowojeba.medianewsonline.com/tofufat.pdfIn PDF document text
    • https://lutovadefok.weebly.com/uploads/1/3/3/9/133997447/sitijaxapibujed.pdfIn PDF document text
    • https://domemasajexal.weebly.com/uploads/1/3/5/3/135304114/juwokom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386837/normal_6019f09ec726a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486748/normal_6028a70916384.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369518/normal_5fd6ecba98199.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://77047a80-9f17-4504-a563-a097c25ca12e.filesusr.com/ugd/5c8b2f_50a06377fae1441ab2a56661d8dc865e.pdf?index=trueIn PDF document text
    • http://nikejubefip.epizy.com/jopiwulimufaxiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eab9b143-eeee-412c-ad32-b9c821401a99/balojewevetufu.pdfIn PDF document text
    • https://21319658-e817-4d6a-846f-872ccfe0f0c2.filesusr.com/ugd/982af2_6e8ba95cb1484e319c2c2f71d3337b95.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/11f05253-dea3-4822-bdbe-3159dbf27d8b/62430221363.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18bbd72a-3569-4b88-90b2-b71257825ebf/can_you_share_a_post_on_facebook_with_one_person.pdfIn PDF document text
    • http://pevogikuxupeja.onlinewebshop.net/lenixupupipuratatun.pdfIn PDF document text
    • https://979cd01f-16ea-4d2c-b189-234964c95597.filesusr.com/ugd/d4c4cf_436c3de6dd084e16be074e896ca4a996.pdf?index=trueIn 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_off0000ea24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA24 5748 bytes
SHA-256: df4fe51a1a4a298752669a1093b649af3f2cf42274d7f3b2c91ae998d8a86a9c
font_01_sfnt_off0000fdcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCB 11016 bytes
SHA-256: cb3c0bc4884037c01d47fa970a77d1452834f000dea8e17ae7a206a32ac7730f

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