Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bee5ae5a62d75db…

MALICIOUS

PDF

85.6 KB Created: 2021-07-07 18:41:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5d5b271e94b3cea752eebaf182bf0627 SHA-1: 6afe0eddc5d40cddbb0333a7f1f7d245e276b651 SHA-256: 7bee5ae5a62d75db484aa0901622a8a95b7753d53d96dbfc5784eac579904047
156 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to various websites, many of which are hosted on compromised or disposable domains. This behavior is characteristic of a link farm designed to distribute phishing content or malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://trungtamgiasuhcmmq.com/uplaod/quangtri/files/46206975537.pdf
    • http://armiikrajowej36.pl/public/upload/ckfinder//userfiles/files/ginevirefajubu.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/c0d82fd2bafa40864ef83c12075e4c43/kobewupesubot.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/17lf21tuu2ci83hinf3r0g5gm6/50235149655.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a708a9c8c4d---zawatiwepomejafobedon.pdf
    • http://moristas.com/userfiles/files/80172394625.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608353d1e5522---45253672810.pdf
    • http://anandamsanyal.com/userfiles/file/joburuwuzulujotiso.pdf
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091c62b54f6f---larasonipajubopelos.pdf
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16073b9a63ec44---banisuwebixafebabafug.pdf
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/zediwujumapumojogafu.pdf
    • https://stradatextiles.com/upload/ckfinder/files/juzowegoz.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/rfvtses6thonv4nrnlt8cfeomj/49563232073.pdf
    • http://energo-winstal.pl/userfiles/file/90633646065.pdf
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/c13436d19e51ce7acc8bc2d486471c24/duvugujefaboxituvumikekun.pdf
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/54ae3061e58b37c5af5959f7bab03868/davapuzejamoba.pdf
    • http://futureinfashion.com/ckfinder/userfiles/files/20032611141.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7a7b14564---28465348992.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd6ade9634---42321994971.pdf
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/88bdaf6e4d158909adbbe3956893932c/wubovevagilalumapez.pdf
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/31a2c1eca1628b6214e6970fa60a9b22/garizexibenotesej.pdf
    • http://lorichphoto.com/pictures/file/junigeroxir.pdf
    • http://derma-dts.de/files/file/dilabenisukebipanenurelez.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b8ea4b9a4c9---wezerotukum.pdf
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/e5iak29tpa8ee8puvu8ematir1/pitomazujibo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=elementary+first+aid+questions+and+answers
    • 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_off0000eb1e.bin
31e2858be341555d31065fd246c6a26f9475db772a2ba89a18b087f50d9fbc11
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1E 16540 bytes
font_01_sfnt_off000115d8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x115D8 16792 bytes
font_02_sfnt_off00012def.bin
6eb83b8bc13e76c59a477e06add2552cefe7bdbd60765e958b81a67eafd6093c
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DEF 10944 bytes