Malicious PDF — malware analysis report

Static analysis result for SHA-256 370f37b9a3a65656…

MALICIOUS

PDF

120.4 KB Created: 2021-08-22 02:28:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: facd95cc10d8283dbd064e46ff9fece5 SHA-1: 0f2615b69d1300487f61c292ec6ae8ca1ea416de SHA-256: 370f37b9a3a65656e472af85f6684da7c86af096ce75d861404b320148dcfa96
224 Risk Score

Malware Insights

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

This PDF document exhibits multiple indicators of malicious intent, including a lure related to 'seminole county sheriff's office arrest records' and numerous links pointing to compromised CMS upload storage. The ML classifier strongly flagged this PDF as malicious, and ClamAV detected it as 'Pdf.Phishing.Trojan'. The document's structure and embedded links suggest it is designed to redirect users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9870

Heuristics 9

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://pixomot.ru/uplcv?utm_term=seminole+county+sheriff%27s+office+arrest+records
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16116ba456499f---11159975053.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16071e117968a3---xamajemividonava.pdf
    • https://on-call-anatomist.org/ckfinder/userfiles/files/62684581123.pdf
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf46d6883e---dopidekuzurojobarobazedav.pdf
    • http://veterky.ru/ckfinder/userfiles/files/39490200945.pdf
    • http://fandimnarodaku.cz/upload/file/novivatokoxoxogefejatebop.pdf
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4263989497---nizaxazilikof.pdf
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/688b545d6a5980874822d2a338a71def/81530369310.pdf
    • http://hoskinspugs.net/clients/40498/File/gizus.pdf
    • https://otelnamore.com/wp-content/plugins/super-forms/uploads/php/files/642104ef6b93e0129b376965cf5858a1/bazepepaxafamowunesamonot.pdf
    • https://essaidafm.com/uploads/FCK_files/file/92154602081.pdf
    • http://bahtiyardishekimi.com/fckfiles/file/bipawabagulileponogi.pdf
    • http://mamnonhieutrung.edu.vn/ckfinder/userfiles/files/pewewilupafabogiseletef.pdf
    • https://spacio.hk/attachment/file/tajuwosuvurunepagoki.pdf
    • https://pmsp-me.com/userfiles/files/suxurovuvavuvogijefin.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb777e82ac---raluzitakopi.pdf
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/86dc6ce7586178207a0ef2d3c7aaf32a/juneralonugelo.pdf
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160868b852274b---dowegabifuworigaxorin.pdf
    • https://ecohort.com/userfiles/files/pakewariwulotegidunuzi.pdf
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/f385f82cf7f4fc345dfe331a802a9911/41655951752.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a34493d6750---96352220664.pdf
    • http://alexlunacoach.com/img/editor/file/miwavunar.pdf
    • http://ats-dz.com/userfiles/file/meforurufot.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/96e77e9bcdd674ae776f827bf16f42fd/zokuvu.pdf
    • http://mannaz.pl/userfiles1/file/81438447008.pdf
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/737bc76d0337dd98c2de9c913b46c8f0/66788777027.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017084.bin
69941a686fdf62a7d9d9ede71cd202c6991b9ad20c216515785dac5408c24df6
pdf-font-stream PDF embedded font (sfnt) at offset 0x17084 17908 bytes
font_01_sfnt_off00019ec7.bin
5cda9e2324919fb9990a3f60d0d0d7e45e71c48963ab16bf4ed3b509367598e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x19EC7 11064 bytes
font_02_sfnt_off0001b864.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B864 16792 bytes