Malicious PDF — malware analysis report

Static analysis result for SHA-256 d262cb9c16e72740…

MALICIOUS

PDF

77.9 KB Created: 2021-07-02 21:33:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 04472c603e969f450f958edd2a1d2b06 SHA-1: 16fc38d090aaaeaab55360c3ef506ff6d831052d SHA-256: d262cb9c16e72740d3c97de6435fab843663bac52f7484bb47c79eddcaa05a39
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress uploads and disposable domains, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely used for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://garglob.ru/uplcv?utm_term=dragon+scale+texture
    • http://dijladentalcenter-qa.com/userfiles/file/kekivipewuta.pdf
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf822c7437---gofizowexigoxo.pdf
    • http://starwindows.ie/ckfinder/userfiles/files/56147122710.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160bb39896c06d---wexujujegi.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/276cb309b3696a5891e065f524f464de/velunu.pdf
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/5dbeaff581400561dabd43b9408e1798/12575477704.pdf
    • http://kfbi.ru/content/file/soges.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/284e84171482724ba6e586142a0f1752/redimarazilafe.pdf
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/85a84a9ccc78f7dfa18268e7b5bbb738/87153394093.pdf
    • https://lienlacanien.com/img_pages/file/67437723745.pdf
    • https://royal-art.pl/uploads/userfiles/files/fuwunuxe.pdf
    • http://artecgroupservices.com/imagenes/file/pugup.pdf
    • http://anhuizpyy.com/upload_fck/file/2021-5-23/20210523024218428920.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/t1r4419n81tadcv87gsc4nl7qb/gufebowakade.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16093b49364139---38791924217.pdf
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609203e9cd41d---48863992388.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c0a81c38e42---jotimixejonir.pdf
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/18ru5pq26m6dms4q45nm1i7su0/94925772009.pdf
    • http://vuatoyen.com/uploads/userfiles/file/tolunan.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/3ebd1abf6d3b277243db4be078260bc4/93294341701.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/36f3eae730103fb7c7b18ee13d237372/52083395237.pdf
    • https://salvatoredivilio.it/userfiles/file/10896790004.pdf
    • https://licorne-hotel-restaurant.com/userfiles/file/87682775072.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_off0000ca57.bin
6b5096ace9ff846b0f026bfeed69e813fb207460268368fee77efd37a8df1016
pdf-font-stream PDF embedded font (sfnt) at offset 0xCA57 10516 bytes
font_01_sfnt_off0000e27c.bin
678acfa17d775cb7b8b02ff9129672595b9fc404587b971195e4b641ed67d92e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE27C 17744 bytes
font_02_sfnt_off00011136.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11136 16792 bytes