Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c29dea0c4fb98ea…

MALICIOUS

PDF

84.4 KB Created: 2021-09-17 19:33:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: bd8d38fc0900adcf04ed64bf6b96cb4b SHA-1: 90e605db89264052ffffe8439452f79fb10c33e9 SHA-256: 9c29dea0c4fb98eae97cab2fc7d33cc5506023badc09d66c4523c0e48a85039b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 Malicious Link

The PDF contains a link farm with numerous URLs, many hosted on compromised or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of multiple PDF link farm heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.hangmandigital.com/files/file/gojejedelababoram.pdf In PDF document text
    • https://astoraccessories.com/uploads/ckfinder/files/37183160990.pdfIn PDF document text
    • http://www.chp.pl/ckfinder/userfiles/files/91618757923.pdfIn PDF document text
    • http://kfoodntea.com/dataroom/file/64053826591.pdfIn PDF document text
    • http://castudio.eu/userfiles/files/kopolutowir.pdfIn PDF document text
    • http://3mfa.com/images/editor/files/losebajiluwoxuroke.pdfIn PDF document text
    • http://dpsnowodworze.pl/userfiles/file/57680282005.pdfIn PDF document text
    • http://fanti-fitness.pl/uploads/assets/file/8387132236.pdfIn PDF document text
    • http://tianlanlawyer.com/filespath/files/20210902074711.pdfIn PDF document text
    • https://wspaperbag.com/userfiles/file/rojomiku.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/161342b8a96fc2---begorosotunaruruved.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b5ef10f8d5---39497580777.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142dff40fff3---20233673515.pdfIn PDF document text
    • https://thietbigas.net/media/files/1864939467.pdfIn PDF document text
    • http://travellightnepal.com/userfiles/file/8857298909.pdfIn PDF document text
    • http://divodizain.ru/ckfinder/userfiles/files/mabilexewogiveve.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/75068978288.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16136145245f2d---15420588217.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/88956885b13de19e2983517bf6c8b8a7/6490029551.pdfIn PDF document text
    • http://predit.ru/admin/ckfinder/userfiles/files/zusixolog.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/1e383db0b3e0f093507b2cdabcf55c0f/38811043381.pdfIn PDF document text
    • https://n-tlg.com/files/file/jukupupo.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/161397ef6a629e---46791767056.pdfIn PDF document text
    • http://luluscafeonline.com/uploads/files/459959936.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=watch+ala+vaikunthapurramuloo+online+free+123moviesPDF 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://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_off0000e20f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE20F 18348 bytes
SHA-256: b6a42425dd34cff9cc6b708f92c3e5324df3ea7ee1da8a4ad13f11fe7884396b
font_01_sfnt_off0001113c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1113C 11340 bytes
SHA-256: 251a6ebf48bb9cddcd9c7d7a7c37ba8742e0d5d14feba032e4c882beb78a4946
font_02_sfnt_off00012be8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1