Malicious PDF — malware analysis report

Static analysis result for SHA-256 e731c51725b86198…

MALICIOUS

PDF

85.3 KB Created: 2021-06-09 11:16:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 180c5eb1270d7b70e3b5d48ed03ea5ca SHA-1: 66af799f18d17bd2dec914b3def34701372c05e3 SHA-256: e731c51725b86198eefb3936cbc0a34ae05b81146a24c0e21fc720305d9b735b
104 Risk Score

Malware Insights

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

The PDF document contains a heuristic indicating an urgency lure and an embedded external URI. The ML classifier and ClamAV detection strongly suggest malicious intent. The primary IOC is the external URL found in the document, which is likely used for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://infrive.ru/pbw?utm_term=allu+arjun+soldier
    • https://cdn-cms.f-static.net/uploads/4468554/normal_604e9eb99f8d8.pdf
    • https://cdn-cms.f-static.net/uploads/4458621/normal_606196f8288a2.pdf
    • https://cdn-cms.f-static.net/uploads/4380068/normal_603e37ab58752.pdf
    • https://static.s123-cdn-static.com/uploads/4470016/normal_5feb9b3fc9c9b.pdf
    • https://cdn-cms.f-static.net/uploads/4409619/normal_605866606150d.pdf
    • https://static.s123-cdn-static.com/uploads/4495257/normal_5fefd8dfd6e7b.pdf
    • https://cdn-cms.f-static.net/uploads/4457305/normal_6059d82e1b002.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://visetululiv.pbworks.com/w/file/fetch/144415248/star_wars_jedi_academy_no_cd_patch.pdf
    • https://uploads.strikinglycdn.com/files/c76c6502-33a0-4387-b789-cad2e44cec6f/xanufapimapixabo.pdf
    • http://jifesepapo.pbworks.com/f/how_to_write_a_good_introduction_for_a_personal_narrative.pdf
    • http://mutoteja.pbworks.com/f/32354340622.pdf
    • http://gajufabeke.pbworks.com/w/file/fetch/144423048/wobijutepoxa.pdf
    • http://lugozamuxika.pbworks.com/w/file/fetch/144564645/what_is_fleming_right_hand_rule_used_for.pdf
    • http://serawazeg.pbworks.com/w/file/fetch/144924636/lerepusapero.pdf
    • https://uploads.strikinglycdn.com/files/1b4bf266-c01b-417f-9804-5c98bdf75339/sorabu.pdf
    • https://uploads.strikinglycdn.com/files/129e4ed5-7c8e-47c4-b51b-cb1aed53093e/dukejizifire.pdf
    • https://uploads.strikinglycdn.com/files/39c69bad-f22c-4a0e-84f1-c405ef148ea6/bofaxejozidadizegu.pdf
    • https://uploads.strikinglycdn.com/files/b93384a0-20cc-4252-bc8e-5c221cbc7836/59618392939.pdf
    • http://mefijunov.pbworks.com/w/file/fetch/144618066/how_to_clean_my_lg_true_balance_washer.pdf
    • http://nolumemonip.pbworks.com/w/file/fetch/144561813/how_to_replace_thermal_fuse_on_whirlpool_gas_dryer.pdf
    • https://uploads.strikinglycdn.com/files/32306782-4f84-4f4e-b506-656bdb1d50d5/marlin_60_laminated_stainless.pdf
    • http://zatesil.pbworks.com/f/pokemon_go_hacks_2020_android.pdf
    • https://uploads.strikinglycdn.com/files/b3ff5416-4ab3-424a-bffb-89c2b2f534b4/mossberg_590_mariner_for_sale_canada.pdf
    • https://uploads.strikinglycdn.com/files/61cc7db2-38d5-42f0-aced-f60887fc75e5/human_trafficking_hotline_florida.pdf
    • http://natizasex.pbworks.com/f/10685319904.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb0c.bin
9e87474ad436d3879b58616366700d831931469969e113a4860a0b6d50f74233		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0C 4884 bytes
font_01_sfnt_off00010bb4.bin
5172cd829d05dc02c16c0fe1586bab8837887909d2d78c8fe0ba87885ec7af8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB4 11112 bytes
font_02_sfnt_off00013218.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13218 16164 bytes

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