Malicious PDF — malware analysis report

Static analysis result for SHA-256 7948e3d85fc4f244…

MALICIOUS

PDF

86.4 KB Created: 2021-07-07 23:54:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6f2942ceb2a4029bc0d855c1b422c9b9 SHA-1: 7217b574791a7ea45ec12e7a4635ee89a75240a4 SHA-256: 7948e3d85fc4f2443327cd00a1369c26d37cb00f34536838ab5dbcc6f7a6a340
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics indicate the file's primary purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://smidgel.ru/uplcv?utm_term=genetically+modified+animals+pdf
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160727e8730930---piles.pdf
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/79528559701.pdf
    • https://aradovan.com/userfiles/file/rupovujuzepaxevu.pdf
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/b562fbc27f14f83c5051aa93358e91e2/vuwaz.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/51e951dce1a9cc88d7effe068857575b/sireparazejo.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b48dd8a2f9d---50792548763.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d0a6771873---naneronomoxijojiliran.pdf
    • http://jinistudy.com/_UploadFile/Images/file/jimorinoraz.pdf
    • https://silverwayshipping.com/userfiles/file/95926353767.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdd6bb7310---getipuwowutozag.pdf
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091d895cca02---95823654352.pdf
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b50af332190---59416376361.pdf
    • https://paperland.bg/uploads/file/32201558519.pdf
    • http://apexibd.com/uploads/fck_uploads/file/75745419211.pdf
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/5dbcefdeeaed826c05487d75ce537b95/tovixax.pdf
    • https://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/66234e24d5f576bf73fd2e4e5934d62c/2903633710.pdf
    • http://harrisonfamilyreunion.org/clients/868801/File/zuxamezujoxuzuwula.pdf
    • http://everest-c.ru/ckfinder/userfiles/files/18035853447.pdf
    • https://digireg.com/upload/69129589405.pdf
    • http://infinity-pro.ru/userfiles/file/66739007727.pdf
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/59999c0fb7ca2cf97d348cab92778775/sewupixiz.pdf
    • https://havanic.com/cache/fck_files/file/xevim.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160723ce6cc330---10885368094.pdf
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c31b7378c0f---66115709595.pdf
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/c1vpi9gdmucv6nmjvbtriuqv7l/92803455171.pdf
    • https://kitapkapla.com/upload/ckfinder/files/lilunenuledi.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_off0000ecb9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xECB9 16792 bytes
font_01_sfnt_off000104d0.bin
66e467093b0917d08dcd317c7e734d441e247e39e10f0bdc05d100dd5f738b2f
pdf-font-stream PDF embedded font (sfnt) at offset 0x104D0 10832 bytes
font_02_sfnt_off00011ddf.bin
e24f4ff8aa2f1a7cac157a1e8f8e1a7cfaa7b097bce83876a70fad6554c7c642
pdf-font-stream PDF embedded font (sfnt) at offset 0x11DDF 17520 bytes