Malicious PDF — malware analysis report

Static analysis result for SHA-256 273290c9ce524014…

MALICIOUS

PDF

86.0 KB Created: 2021-06-22 22:43:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: acee50ba27f36bf05200b20b19513568 SHA-1: 181fa6c9d2a2ae283587033ee12cd7cd7b93614e SHA-256: 273290c9ce524014fb5a7672f9744ac4a6f036fa4beaff158edc8dab5a4caeda
196 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains a 'Clipboard command execution lure,' instructing the user to copy and paste content into a shell, which is a common technique for downloading and executing secondary payloads. The document also includes numerous links to external sites, some of which are hosted on compromised CMS platforms, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://metabolit-plus.ru/files/file/mizogijudujizame.pdf In PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/c1c033d98d0ba236a2d0fce8d25b53c6/ruvasabimevomokofotep.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/q4uvqcj87ngj9bigftb30be7aj/kapagexotekadatak.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/4708c8207553ba7acb3683543508e5b4/juzafifi.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608dbfdbd6830---36118258069.pdfIn PDF document text
    • http://kapsalonvogue.nl/files/file/jorikanelijibuvezupuziz.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afad2b5d144---2967387988.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088dab585442---pofoguvebixukibumozibef.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606d573fd66b6---27377151637.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bab23e30fb4---86067394687.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f450b5228---5458219988.pdfIn PDF document text
    • https://klcmekatronik.com/ckfinder/userfiles/files/zebawibekogodogejotuje.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/0f869291b4e47acc3a0080cb8812f5e4/dujejimazomapur.pdfIn PDF document text
    • http://asbazainville.org/userfiles/file/10864210506.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/a77m2d3cckcj0no5022706huk9/70511403855.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5acba6b5c---41358621384.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/wugoxusurexof.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae3fd43a79c---dovefitotukijesuvopimoma.pdfIn PDF document text
    • https://voyagerf.ru/wp-content/plugins/super-forms/uploads/php/files/f6bf9c0919dc11dabe23443dc1cb5776/gulub.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/7785872798.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=scanned+image+to+excelPDF link annotation
    • 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001117e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1117E 5156 bytes
SHA-256: 7e27a9e8776156e1363523e0280556f18c37d90d3f7a772a624b85800cd9c874
font_01_sfnt_off00012300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12300 11728 bytes
SHA-256: 721eb03b76e763fb81133ce50343126b7f57961d77cce9b2ea068feae47d9780

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