Malicious PDF — malware analysis report

Static analysis result for SHA-256 78faebada9163ecc…

MALICIOUS

PDF

93.1 KB Created: 2021-06-07 04:27:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 2a98157c2059fad1b46523ef9a9ba79e SHA-1: c98e8922067ec63da632e04ac3ba8552efb624b9 SHA-256: 78faebada9163ecc941de583475779dd62e0672d3ef205670d664997a4ac5576
96 Risk Score

Malware Insights

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

The file is a PDF document detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into visiting a malicious site. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to deliver a malicious payload or redirect the user to a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://fokemale.ru/123?utm_term=aplastic+anemia+treatment+guideline PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4423189/normal_6051aa40a0f46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423700/normal_601d22940cfb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384634/normal_60566aae1fd1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468550/normal_6029cb62df49e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466379/normal_5fdabc53a9dbc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459805/normal_60025c461648d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367302/normal_6054edd409425.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495246/normal_6045fc665cf38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419425/normal_6054531b73152.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414335/normal_5fd06fec90ef0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387573/normal_6029b2316c367.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403141/normal_600eb521714e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451561/normal_5fd5f17b7b4c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368238/normal_602ebcd17644b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498330/normal_60bbadab16214.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wojipag.pbworks.com/w/file/fetch/144659820/is_canidae_grain_free.pdfIn PDF document text
    • http://jopamedet.pbworks.com/w/file/fetch/144585732/midazezevozunudofebi.pdfIn PDF document text
    • http://pikalunik.pbworks.com/f/nmero_ganador_de_mega_million_ayer.pdfIn PDF document text
    • http://jilawuxifi.pbworks.com/w/file/fetch/144580470/facebook_login_code_not_received.pdfIn PDF document text
    • http://fixunomavow.pbworks.com/f/watirabo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011aeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AEB 5380 bytes
SHA-256: c98c54ab97f81998d7b8b01cd58183ffff8ba2c98f3ce78a787ad5bbcb7d07a9
font_01_sfnt_off00012d20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D20 10780 bytes
SHA-256: 807ef65b2597ee9176394126db28c25991321be71bdc7a9088eb224a3ffd0814
font_02_sfnt_off000151da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151DA 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

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