Malicious PDF — malware analysis report

Static analysis result for SHA-256 978dbd8995c01c9c…

MALICIOUS

PDF

87.2 KB Created: 2021-06-27 23:16:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 22648dcd3bece3ddb0ff335e34bf3117 SHA-1: b2a9259d765371f4b19b49e95333a139c6a4215b SHA-256: 978dbd8995c01c9cc9d8b37c422932991f014100dff1e546ee33dbf2589b5fff
196 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of an advance-fee scam. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting an attempt to distribute malicious content or phish users. The document's structure and heuristic firings strongly indicate a lure for financial fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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 http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f128fbbcc6---89832243890.pdf
    • http://bensonlandscape.com/editorData/file/vosarimoxojasokalob.pdf
    • http://aite-materials.com/upfiles/file/botoxijimodevabotoroxa.pdf
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/58b92ab74a2edbee369dfd2745116a08/pebikujebivilojokites.pdf
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/i3uoljnbptki9sfje6nf28unf5/fetifabifemipejimurefom.pdf
    • http://status-go.net/gfx/userfiles/files/63657692293.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094babb66ead---feregovem.pdf
    • http://llux.vn/uploads/files/30079757361.pdf
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baae2aa85ba---97328979282.pdf
    • https://sssmri.com/ckfinder/userfiles/files/76940794835.pdf
    • http://cnc-soustruzeni.cz/files/file/wipodutuvajudi.pdf
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf60c901aa---96017989257.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16094ae54d0863---13458986307.pdf
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/17f9e81224b7a3337e1d5e1790d94784/70159597396.pdf
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16076d86610856---pumabulopubofidadabu.pdf
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160963c0744818---98223370338.pdf
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/2cf790413baa40b55dc321c94ccd61c9/21410349555.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b7d016498---vazoxesizixesumulinade.pdf
    • https://soudurelauziere.ca/upload/editor/file/tokobodelosepekewopir.pdf
    • https://musikkursus.dk/userfiles/file/bapotemubakewak.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc31624112---mokafetavunanapa.pdf
    • https://almondzwealth.com/administrator/imagetemp/file/gonixoradubaben.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/1f08a9563df09e3d357cce0c0f02f53e/gotazoxiwaxategexisakanal.pdf
    • http://amirafouad.com/uploaded_files/file/tijewibegagud.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=biology+mcq+for+competitive+exams+pdf
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/70a82db07dcad00bd22268bde7be0e8b/vowobilolafazewuxar.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_off0000efd3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD3 16792 bytes
font_01_sfnt_off000107e5.bin
12b13cad03d2fca6e53207f688e109f76e6ed9d3b5da2d09d9be8293685148e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x107E5 17256 bytes
font_02_sfnt_off0001350d.bin
ff640738c573a640fccd3141678cc5aac8979b0380b1d246436d71352440daeb
pdf-font-stream PDF embedded font (sfnt) at offset 0x1350D 11340 bytes