Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1698ad6cb90153b…

MALICIOUS

PDF

85.9 KB Created: 2021-09-01 09:12:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b51f4ed223c8dd59a17548f6927c2662 SHA-1: 28acfe60709a89e81e5acfaf07d5bd58d1651fb7 SHA-256: f1698ad6cb90153b60a03c528513e3ef4325a0e38849e81d33d7af40148d56b0
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious content. The 'SE_PAYMENT_REDIRECT_LURE' heuristic strongly suggests the document's purpose is to trick users into changing payment details. The presence of numerous links, many pointing to compromised CMS uploads or disposable hosting, further supports this phishing attempt. No scripts were extracted, but the document's structure and embedded links are designed to facilitate a financial scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://mobilenmr.com/files/files/11400541383.pdf In PDF document text
    • http://studiodabo.eu/userfiles/files/34365285936.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/mupenejolomemetiso.pdfIn PDF document text
    • http://trineckevzdelavani.cz/webpagebuilder/ckfinder/userfiles/files/xiluxewokobaralegepolawej.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/3325be99f15161f6400b97c42d0ef37e/94583423939.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/sevogomatufixena.pdfIn PDF document text
    • https://promobryansk.ru/userfiles/files/xipilatizefojofokogupiw.pdfIn PDF document text
    • http://namthangbasaltstone.com/uploads/image/files/mikavudufibep.pdfIn PDF document text
    • http://hpworld.hu/data/pic/Image/file/89937511529.pdfIn PDF document text
    • https://serviceservice.eu/userfiles/file/98038609981.pdfIn PDF document text
    • http://e-district.org/userfiles/file/35124068967.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/tempene5q9cvt96opkdnffmhuh/nokezadivubowavuvomufajor.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/8s52i47lqek8huok8d1g1d9n8a/64998783686.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/9461e2348f7e5842065aaebdccf07b1a/99151342901.pdfIn PDF document text
    • http://dr-onesrl.com/userfiles/files/67344942972.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/7bedd655095e2022a96513ec8a85bf47/93524671924.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2aa27bd390---revemewulutiromox.pdfIn PDF document text
    • http://anysoldierfundraiser.com/clients/a/af/af293656121fcb8b60a8c910089dd81c/File/fevevixemozipulu.pdfIn PDF document text
    • https://cmetrix.net/ckfinder/userfiles/files/33151684550.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8a26e31fc---14245384275.pdfIn PDF document text
    • https://digireg.cz/upload/93304796554.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a728014b35---fadaxevipixagiwizo.pdfIn PDF document text
    • http://kalikraft.com/images/file/48593586858.pdfIn PDF document text
    • https://bakwanudang.com/contents//files/32955199301.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=uno+reverse+card+among+usPDF 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_off0000e67c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67C 10648 bytes
SHA-256: e15644579e6b4618b71bed7b5fa7823e26bcf22780fd0ed9bf197866894755f9
font_01_sfnt_off0000feb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000116c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C4 19088 bytes
SHA-256: 09810d1c2c427240081143a314572f5adc4e8c2e51f1b57fca4158878799bf8a

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