Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa6a404e2fabbfbe…

MALICIOUS

PDF

100.2 KB Created: 2021-08-09 08:07:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 73ffd0aa4913d76c9c11aa7ab6fada5b SHA-1: fc0b71bb7095ff0bd2a18e8f27a0e7587ba7f433 SHA-256: fa6a404e2fabbfbe91ca7fa0805f95f3261393ecb8a905f705193fafd28c2560
176 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document contains numerous links to external websites, many hosted on compromised or disposable domains, suggesting a link farm or redirection mechanism. The 'SE_CALLBACK_LURE' heuristic indicates the document likely prompts the user to call a phone number, a common tactic in callback phishing and tech support scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9875

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
  • 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://nomylo.ru/uplcv?utm_term=what+size+tires+for+my+2005+honda+odyssey PDF link annotation
    • http://baudoinfamily.com/clients/f/fc/fc66627f90e8a365851b026dcf169025/File/taduwurizomukegel.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/vogasoduzilop.pdfIn PDF document text
    • http://coyada.com/up_images/up_images/bololedubog.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/93711956964.pdfIn PDF document text
    • https://whitesal.com/data/images/file/8574_20210529120609.pdfIn PDF document text
    • http://10glazsikeyrosa.ru/file/bigamudifu.pdfIn PDF document text
    • https://chataigne-cevennes.fr/imgs/files/80001167969.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608dfa21e347e---fiboderarafujevila.pdfIn PDF document text
    • https://lederstuehle-shop.de/ckfinder/userfiles/files/pomubajomuzur.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd4191ccafa---53319937624.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093d4cb17b77---42442222663.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606faac1b882b---43148961814.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/0437fb3afdb12bb6a6268e0ab9714f3e/24232896189.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c91591e4cfa---ratapukegawosalojatagekis.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4ca2ad4ea---koxolelimig.pdfIn PDF document text
    • https://alternatifhirdavat.com/upload/ckfinder/files/vesonozilo.pdfIn PDF document text
    • http://ruihuitax.com/files/file/69383238941.pdfIn PDF document text
    • http://georgefamilyreunion.org/clients/86186/File/58028839376.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/dc3b09c1509c1f23cacb1bee5096ef54/96179138134.pdfIn PDF document text
    • https://maharajganjtimes.com/assets/ckfinder/core/connector/php/uploads/files/rabafakurokoganepelug.pdfIn PDF document text
    • https://avphunter.ro/ckfinder/userfiles/files/96179060329.pdfIn PDF document text
    • http://ilovegabal.net/fckeditor/_upload/file/wefemufanalifaruletopudu.pdfIn PDF document text
    • http://71mhsreunion.com/clients/f/fd/fd19d29f3ef40f7e1d0269d1df38e7d4/File/sigavokutimoxefunadopogor.pdfIn PDF document text
    • http://thanuyentea.com/ckfinder/userfiles/files/11039110234.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160a5766b84b75---fixus.pdfIn PDF document text
    • http://www.themixchange.com/userfiles/files/52853161004.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_off00011fba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FBA 18520 bytes
SHA-256: d0e94f9b134fb59fb8c8b76f5a37ef89c237526f1bfedff893fe0cc51801e570
font_01_sfnt_off0001507f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1507F 11116 bytes
SHA-256: b791ff06eef09b14188ca0890c63f6f5c6b5e6e2cd280ac39c89256c3ecbf6b5
font_02_sfnt_off00016a7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A7C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1