Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3c74f36801147f7…

MALICIOUS

PDF

87.0 KB Created: 2021-03-31 09:10:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bff8c76ccf1e260e1273bf0092c4b77 SHA-1: b572e81e80ea0e2eb864686d303c9399895ab617 SHA-256: f3c74f36801147f77ef8564320a1d09a7f9eb4aed6cadb771dc9a07e4100ddb4
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, likely serving as a lure for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://vilenefex.ru/wix?keyword=friv+games+unblocked
    • http://gbarb.me/398709026550kkcs.pdf
    • http://hamlikjorettoop.ru/durudawlaci.pdf
    • https://static.s123-cdn-static.com/uploads/4376612/normal_6005e5a91b699.pdf
    • https://cdn.sqhk.co/gozolijitow/NgfSMvb/volixumotikut.pdf
    • http://about-central.com/75313527200lulb7.pdf
    • https://cdn.sqhk.co/kusamika/4ejfgia/dome_of_doom_mod_apk.pdf
    • http://help-lnstagramcopyrights-verify.com/minecraft_pe_0.14.0_descarga_livre45fuv.pdf
    • https://cdn.sqhk.co/rubekafux/ijRSagi/10701457873.pdf
    • https://cdn.sqhk.co/wifuponi/ejajbQR/collage_maker_app_for_iphone_4.pdf
    • https://static.s123-cdn-static.com/uploads/4454052/normal_5ff1e885cb827.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gopuze/60541919393.pdf
    • https://s3.amazonaws.com/winumigutam/nilajatazevuram.pdf
    • https://uploads.strikinglycdn.com/files/a6a5b88b-41ab-4cdb-b345-b9d5d457c91f/32637961039.pdf
    • https://uploads.strikinglycdn.com/files/33ffd621-9ad6-4e82-b33d-94ecaa6588c8/how_to_get_your_fire_stick_remote_control_to_work.pdf
    • https://s3.amazonaws.com/vezumobigodub/bootstrap_template_simple_free.pdf
    • https://s3.amazonaws.com/dazuxujepov/fazosibuzadimorugiz.pdf
    • https://uploads.strikinglycdn.com/files/bfc64721-4fbb-4209-89ed-656d318819df/sopivazekerewuxavoma.pdf
    • https://s3.amazonaws.com/mefovu/abortion_law_reform_act_2008_victoria.pdf
    • https://uploads.strikinglycdn.com/files/45305263-064c-474e-a8db-8ecabb680f8b/buzazubatupunavoxapa.pdf
    • https://s3.amazonaws.com/mukutud/lisuzujul.pdf
    • https://s3.amazonaws.com/jowutoneranemuk/tojojubanamevubo.pdf
    • https://s3.amazonaws.com/dazuxujepov/bell_hooks_killing_rage_essay.pdf
    • https://uploads.strikinglycdn.com/files/3846a2f7-1669-4211-b22a-0339d207cd9a/jalabopoleginobawetudolak.pdf
    • https://s3.amazonaws.com/remavuj/23040215380.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_off00011503.bin
734576da898249b142b6856063b61794ae6ce6091a1a291c23e038f069e59dc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11503 5476 bytes
font_01_sfnt_off00012795.bin
4c23ceefcb5ea786846670ff60c9d1128f94eadccca785a76091ce9aaa036ff7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12795 12384 bytes

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