Malicious PDF — malware analysis report

Static analysis result for SHA-256 66c50b16cab9602d…

MALICIOUS

PDF

86.3 KB Created: 2021-05-11 09:42:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b68b93ac94fa3243db427fffdb871a4 SHA-1: 6b984088fee7ec95ccc05c07fe8ff68a0f47690f SHA-256: 66c50b16cab9602d42bef8589f8d17dcb4cfee1450eb1fa78e4d8f150da1f701
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, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though partially corrupted, suggests a lure related to 'credit in English', which is consistent with phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/strik?utm_term=titulo+de+credito+en+ingles
    • https://cdn-cms.f-static.net/uploads/4410018/normal_6028f5f75abef.pdf
    • http://mini-cam-v2.club/simple_3_card_tarot_readinghq9ne.pdf
    • http://uscovidcharts.com/gebemalupepibavevesuceolg.pdf
    • https://static.s123-cdn-static.com/uploads/4378848/normal_5fc87f8885388.pdf
    • https://cdn.sqhk.co/fifenije/cjdcgfy/element_td_dota_2_guide_2019.pdf
    • https://cdn.sqhk.co/xumelesep/iies2Nc/myths_and_monsters_little_alchemy_2_apk.pdf
    • http://gatorama.site/metamorphoses_ovid_summarykf3ck.pdf
    • http://greatholl.com/can_you_please_answer_me_traductioni9w9j.pdf
    • http://promooffer.site/jose_emilio_pacheco_principio_del_placerf0y1b.pdf
    • https://static.s123-cdn-static.com/uploads/4411500/normal_6007debdea598.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/aa76292f-50df-443b-bc30-d147d8e446a5/32688371517.pdf
    • https://s3.amazonaws.com/xuvamuba/android_messages_change_bubble_color.pdf
    • https://uploads.strikinglycdn.com/files/7f83f873-5411-43b6-8967-2ba7cdc0c9f6/expository_non-technical_writing_sample.pdf
    • https://s3.amazonaws.com/wikurixobelu/76341056323.pdf
    • https://s3.amazonaws.com/falevi/88431270437.pdf
    • https://s3.amazonaws.com/besafefaf/dirovidajelasisemaxexunes.pdf
    • https://s3.amazonaws.com/wefadep/giguvipikorojuliwif.pdf
    • https://s3.amazonaws.com/xisefowu/championship_manager_2010_data_editor_free.pdf
    • https://s3.amazonaws.com/dazuxujepov/dewexarenokapukibawag.pdf
    • https://s3.amazonaws.com/kopisigapub/bajirao_mastani_picture.pdf
    • https://s3.amazonaws.com/makumapikeze/christmas_applique_patterns_to.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_off0000fc23.bin
ddadfd034748be70e0c8f082e3c049ef6a377195d074b93525e09ab62116c8d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC23 4848 bytes
font_01_sfnt_off00010cac.bin
a585379a06611ee7a6ec46137b8871e440f03d52aac1a938209be39d3a9db27d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CAC 12252 bytes
font_02_sfnt_off00013444.bin
770b38bb816afc2b7e7b9234a418820eccb7df8a66542148fa1cff3de02d867e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13444 16404 bytes

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