Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8a2b47434e8c1db…

MALICIOUS

PDF

88.3 KB Created: 2021-09-04 17:23:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 78c1cd0082a78afc0b2d8dcb17e9972c SHA-1: baf375e0294df9503c316432d92fe2c92c929193 SHA-256: e8a2b47434e8c1db36693deb3fd142cdbf3c655115e0b9faa9b9b68c9e9b21ce
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, specifically a payment redirection scam, as indicated by the 'SE_PAYMENT_REDIRECT_LURE' heuristic. It contains numerous links to potentially compromised websites, suggesting an attempt to redirect users to malicious content or phishing pages. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • 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.
  • 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://www.hotel-restaurant-plainfaing.fr/ckfinder/userfiles/files/43745410812.pdf In PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/2bdvgoc3s7sm4qtfh76o95a5d1/polok.pdfIn PDF document text
    • http://solemarservizi.it/userfiles/files/mepefijefowosozog.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/d0b60c4e03e268c00c5bb1273cd2e944/16982692580.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612381187137b---pijekuzezumadoxedaluv.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f9d678af9---74118254116.pdfIn PDF document text
    • http://volkshilfe-ktn.at/images/content/files/gazidutinazo.pdfIn PDF document text
    • http://iphysiology.ru/upload/gamezogo.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/34722565784.pdfIn PDF document text
    • http://fivesteps.pl/userfiles/file/wiruv.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/67628971032.pdfIn PDF document text
    • http://paletydozahrady.cz/ckfinder/userfiles/files/96896394794.pdfIn PDF document text
    • http://www.benyowsky.com/resources/files/67291569015.pdfIn PDF document text
    • https://walnutcreekguide.com/wysiwygfiles/file/kevirasomapifubewewiwinav.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/e0e751a8b069a30c548085f1436f16d5/31344025035.pdfIn PDF document text
    • http://cathayred-csr.com/img-cathay/files/betaweraxemoginubusiwefa.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a84ab68520c---rufuvi.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/6859f5a32aacb14c70fae6423f8d3728/75041713621.pdfIn PDF document text
    • http://psn-monolit.ru/img_file/files/joxule.pdfIn PDF document text
    • https://vrindaindia.com/php/joseph/uploads/file/2248394701.pdfIn PDF document text
    • http://samurairamenbar.com/uploads/files/62699856180.pdfIn PDF document text
    • https://exihomes.com/userfiles/files/xulaxusox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=kendrick+extrication+device+user+manualPDF 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_off0000ed5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001056c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1056C 20808 bytes
SHA-256: ed1c10cff13978f1c64a09716144f4a38c85f6601cf7c7e7120320b4c1f31717
font_02_sfnt_off00013a5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A5E 10880 bytes
SHA-256: f6a3f79f2dd6ef20e61669ec07a2f16e1a2726f0fff2ee0688feb913a8c34500

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