Malicious PDF — malware analysis report

Static analysis result for SHA-256 407a7cad212a987e…

MALICIOUS

PDF

95.3 KB Created: 2021-07-08 02:48:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0b922c02616ed062f3d8b58133e28b4a SHA-1: 0536c465b69dcd2f02eb85bbb88ed328f39fad04 SHA-256: 407a7cad212a987e5a76801bda8dc6091b6fdad2d222e8796f550c64d4622e10
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised WordPress sites. These links are likely intended to lure users to malicious websites for phishing or to download further malware. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/qtn4djq0gkqcfgmg0tofhultug/putolonen.pdf In PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/2af7368f34729b8983fc170c5965817a/74869883524.pdfIn PDF document text
    • https://brawlcall.com/ckfinder/userfiles/files/sibimijebopizivemetufimu.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9040744b43---83149097216.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/i8uojq4rd1lrbfc8g1ejdso29m/75445856765.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/vubanipore.pdfIn PDF document text
    • http://2440027.ru/upload/file/dikujiwuvinoladiji.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8db24ad76f---60068273729.pdfIn PDF document text
    • https://sbufficio.it/file/79043080717.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/529f2593a989a7295fa356df5521bb72/2544353226.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160864ce473ef7---govulafepegejevotumavovu.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bada23667f8---22076307772.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/ughjl294seh2jofb7lorfiqs6m/63035509590.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/7892fa17367a760804ce60fa2df604ba/solaleviniwabobabosami.pdfIn PDF document text
    • http://cdmatik.com/uploads/file/53546348917.pdfIn PDF document text
    • http://soepcentrale-dekeyser.be/userfiles/file/82323913001.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16074bcb052596---50662369755.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16087e353dc15e---62414703823.pdfIn PDF document text
    • http://stsaischoolamritsar.com/slbdavbatala/userfiles/file/54230601605.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/cd1b1221a66367606ffa22c2fff32237/vuzefexokedu.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/9166361475.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/ql7sc94b3horffpit6vodomlle/34517926290.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607914d24d858---moregasopofemowaxosufogoz.pdfIn PDF document text
    • https://giustofiori.it/file/32736863459.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=peppers+on+hudsonPDF 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_off000111c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C7 18148 bytes
SHA-256: 330a66ed5634ae0dd2a27f2a30eaffc4f0285b0b2de5f5e98aa62feeaed50f1e
font_01_sfnt_off00014167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14167 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001597e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1597E 10192 bytes
SHA-256: 2048eaf5512fbaa2b4b74543aa931e86edd2bd299a5c9a5073ddefede84b175c

Open this report in the interactive analyzer, or submit your own file for analysis.