Malicious PDF — malware analysis report

Static analysis result for SHA-256 014bd531eeccb218…

MALICIOUS

PDF

87.8 KB Created: 2021-07-31 09:08:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 72361313ec17373095e9323d3aec90ee SHA-1: 72889b84fa289a2da67b46b64420958ac381a608 SHA-256: 014bd531eeccb218ce880f23f9a32c6a79a09f5f30470ab5149ba6d8977d3e21
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content or phishing pages. The presence of external URIs and link farm heuristics indicates an attempt to direct users away from the document, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://coretry.ru/uplcv?utm_term=how+do+i+get+my+netspend+bank+statement+online PDF link annotation
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/fc8c83bfdcdb230f4968a014b9bd38fc/bijivexiwule.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bd9c3f2c439---negiduzuvodum.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/eciqlgu7h0dl6v6c7l7qdha2t3/82006497929.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/5b3ab1b3e6d9c24a3f9b76e6b7094d95/84658394644.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae107325791---26482757739.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160803ba52de04---60248234188.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/54512520723.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075ecf2a7bfd---32642718382.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/rusesamekadikikanixori.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f42555a61---ranotovidezizudebo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd6c1b9a385---38292933186.pdfIn PDF document text
    • http://studioguidobarbieri.it/userfiles/files/zogerasomelazomuxosaxegi.pdfIn PDF document text
    • http://azizavacanze.com/userfiles/files/bopumonile.pdfIn PDF document text
    • https://merydian.pl/nowymerydian/userfiles/file/bovaxerewimodul.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/29211984702.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/8213972054.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/80562162682.pdfIn PDF document text
    • http://benjamin1908.com/clients/f/f4/f4560e3fe432b95d15e234f900dec36a/File/meriwuxaxileno.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed693982cb---71520534089.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/xabisalipobufefamola.pdfIn PDF document text
    • http://chikatere.com/Upload/files/debulasetetireno.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e4f54a6520d---gubiraduvelok.pdfIn PDF document text
    • 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_off0000f355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF355 11056 bytes
SHA-256: 78a9d51be2bb7401409bf69eaae80d4017cc91e4eb7b236a05cb9efe200809f8
font_01_sfnt_off00010ca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA5 17064 bytes
SHA-256: c0863553c89cbe155e9c3e85470e830925efe86674f8d7c8394b7a9fc5f4c2e3
font_02_sfnt_off0001390c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1390C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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