Malicious PDF — malware analysis report

Static analysis result for SHA-256 96771ffd90193398…

MALICIOUS

PDF

88.4 KB Created: 2021-07-26 04:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8dc5a69b55e750214a588f9c64cf8696 SHA-1: a18b15a26dd607be690bd8797310719a78dadf84 SHA-256: 96771ffd9019339851d423a6c97084764237066d7315ac9d17fe28abef74818f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is flagged as malicious by ClamAV and an ML classifier, exhibiting characteristics of a callback phishing or tech-support scam. It contains numerous links to compromised CMS uploads and disposable hosting, suggesting an attempt to host malicious content or redirect users. While no scripts were explicitly extracted, the presence of PDF-specific heuristics and the overall structure indicate a malicious intent to deceive the user into initiating a fraudulent interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://pass-eco-energies.com/ckfinder/userfiles/files/90372195955.pdf
    • http://akgikorea.com/file_upload/fck_upfile/file/59720891314.pdf
    • https://edu-mate.kr/_UploadFile/Images/file/sizadetasokog.pdf
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/hl6gm987t504596bfgshiskun7/11928762947.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160812613a7562---26590570631.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a347cd60bad---pixoragutiziwezip.pdf
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/gezuri.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16086b2b76e0e6---91233991110.pdf
    • https://basalyemek.com/ckfinder/userfiles/files/joguj.pdf
    • http://palirna-frydek.cz/uploaded/file/juzesirebimezedipoba.pdf
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/8b203d27cf0104717ec4e82987fa0782/37240917401.pdf
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/295bcc333059c4865e2b3517aba238ed/golofe.pdf
    • http://cablexconsulting.com/Upload/file/68646264907.pdf
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ba533d894c3---dirovur.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/408c529c268b85a7e8ff49e1fbde6e51/45615070072.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160f61204d6a29---24089300458.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160776d70d8357---55000321248.pdf
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/wiketiwusosaxusenapasevis.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8bd2edfcd---kebunexomudirepabum.pdf
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/mgiqs58vaap360lumku3l2p7tq/32350826081.pdf
    • https://nbcmedia.vn/ckfinder/userfiles/files/momubepenusimeli.pdf
    • http://gemculture.com/userfiles/file/dekig.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d67a09bc183---21891051660.pdf
    • http://chandigarhdatarecovery.com/files/file/temikonapoxibivupudokawo.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b55bb75797---valolodolotamuwigewu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=how+to+accounting+for+small+business
    • 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://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_off0000f4ee.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EE 16792 bytes
font_01_sfnt_off00010d00.bin
12ab16e0a668c21118037b737b99f8c17d6edaebaf425d6f9c9904682064db8e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D00 17304 bytes
font_02_sfnt_off00013a45.bin
94ac039df80e726c59d443e0e7a23961882881f9e230996af870e7a8a2184a99
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A45 10996 bytes