Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbfd5a7705a0f578…

MALICIOUS

PDF

107.4 KB Created: 2021-09-02 02:02:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e8695a2c1f5699227df02c3d3fb69c97 SHA-1: 16ca0353bb7be076216ed1a4ee65b35c4726ea6a SHA-256: dbfd5a7705a0f578e6b3d7fcc67b2fa21ffd4b98cf761c3c0fbec2c4d8245cb2
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics indicate it functions as a link farm pointing to compromised WordPress upload storage and other disposable hosting, likely to redirect users to malicious content. The 'Payment redirection lure' finding suggests a business email compromise tactic, aiming to trick users into making fraudulent payments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160764cd9ced37---5500403825.pdf In PDF document text
    • http://goldmustang.com/files/files/38547897910.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160dd995666c7f---70368958803.pdfIn PDF document text
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/zabulafemelorenolekike.pdfIn PDF document text
    • http://tygodnikzuzlowy.pl/ckfinder/userfiles/files/72948692313.pdfIn PDF document text
    • http://email-database.info/userfiles/file/towupukiturugutupoje.pdfIn PDF document text
    • https://autotronics.vn/userfiles/file/11228167036.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4e6a6d47f9---liwexagilulip.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f4ced79a9b---tuzesekuzunafekifagemenon.pdfIn PDF document text
    • http://liccuza.ro/stiri_files/file/sixevu.pdfIn PDF document text
    • https://ystechpro.com/nbloom/fckuploads/file/82217757064.pdfIn PDF document text
    • https://peilimineko.com/userfiles/file/kawetomunobonikope.pdfIn PDF document text
    • https://wineuniverse.us/userfiles/file/sagodumudukasigomipup.pdfIn PDF document text
    • http://hollywoodterrace.org/clients/863344/File/23224923110.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/13faec6b5411ba484604fa1595226670/37710899149.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/13043847977.pdfIn PDF document text
    • http://gdwtechnology.com/fckeditor/file/meponapanixinobajelewu.pdfIn PDF document text
    • http://geodavidepini.it/userfiles/files/42269196325.pdfIn PDF document text
    • http://www.psoealora.es/ckfinder/userfiles/files/wubalalulup.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d38ece3d98---22062581224.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/klchg6nidl6dgb4dsfcj5g4991/7930128458.pdfIn PDF document text
    • https://wemservice.com/ckfinder/userfiles/files/40453679735.pdfIn PDF document text
    • http://maturitni-ples.eu/UserFiles/File/jijivi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=giver+chapter+12PDF 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_off000140c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140C6 18448 bytes
SHA-256: b90a8fab6c5f9df376afe3e947fba74f47cef583acdf96e55d2cc6448f1dbb6e
font_01_sfnt_off00017037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17037 10312 bytes
SHA-256: d74a799b4592522036578fde284a5a57a21bffe1176aec4ef555c46817fecc75
font_02_sfnt_off000187be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x187BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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