Malicious PDF — malware analysis report

Static analysis result for SHA-256 abbbc598773036d6…

MALICIOUS

PDF

74.4 KB Created: 2020-12-21 14:26:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a477b2057e7808a2f4f19f237b8f0f4 SHA-1: 93cb1159a0ec60280d1e75a32a2d3cd016562e06 SHA-256: abbbc598773036d64111e4c817e3a2aa86a9c376ee5a240a82e88dadb44e5fc1
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, and multiple other URLs hosted on Weebly, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to deliver malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffine.ru/strik?utm_term=cosmopolitan+hotel+las+vegas+deals
    • https://nujetamewude.weebly.com/uploads/1/3/4/8/134881912/5104663.pdf
    • https://worijuxadije.weebly.com/uploads/1/3/4/8/134863955/sivav.pdf
    • https://cdn-cms.f-static.net/uploads/4373519/normal_5fd3b8875c465.pdf
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/podopiribaregijafej.pdf
    • https://cdn-cms.f-static.net/uploads/4486778/normal_5fd19d978bdc4.pdf
    • https://cdn-cms.f-static.net/uploads/4387713/normal_5fa2200a37cd8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8a4686ad-6ee5-4dc5-8b4a-5152599ae1a2/riperegipafakenose.pdf
    • https://s3.amazonaws.com/suzujewa/grand_chase_mobile_lire_guide.pdf
    • https://s3.amazonaws.com/turip/sirapirivinaludunubogaxu.pdf
    • https://uploads.strikinglycdn.com/files/f8d8696b-e907-4bd2-bc2e-fa3b42741a8f/sd_maid_unlocker_apk.pdf
    • https://s3.amazonaws.com/sugosubexez/concise_oxford_english_dictionary_12th_edition.pdf
    • https://uploads.strikinglycdn.com/files/12ef3c55-af79-4b7c-ba93-0bfed98e8077/dasex.pdf
    • https://s3.amazonaws.com/ritoma/consulting_firm_website_template.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e55b.bin
6ff11d657d8af86197421f22d31ae9232bc951b0e5b349382067cd846dc3345f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE55B 5244 bytes
font_01_sfnt_off0000f70e.bin
652a1f05d2afd2cb8baebee44e03aa8f4edb1f0bb8332f5ddb79871069a1d328		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF70E 11200 bytes

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