Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2a351bcda6fd42d…

MALICIOUS

PDF

145.0 KB Created: 2021-07-28 04:44:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8cbced4d5a0a0de4879ed45857d893cf SHA-1: 4db7e1d5536d6af29f8c11d0d157c95bfc336cd1 SHA-256: d2a351bcda6fd42de3e5aaaeea07aae833e065e8ebb39dff51ce2656bbd30e99
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. The heuristics reveal it functions as a link farm, directing users to multiple compromised or disposable hosting sites, likely to distribute further malware or conduct phishing. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7206

Heuristics 5

  • 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
  • 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://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b8fb029e0f7---jaboradusalofubulim.pdf
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/turatosasusunene.pdf
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/5323684593fa72345363c913b1a18cf7/wiworetemifosojofolapaboj.pdf
    • http://gorisum.net/fckeditor/upload_file/file/zodapu.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/a488e51b5318872799da3d495300bedd/wutudexefikat.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1dbe5a8d9---24828181819.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8e323d11b---82702100283.pdf
    • https://walnutcreekguide.com/wysiwygfiles/file/dadovunepedemakewoguk.pdf
    • https://mn-lawfirm.com/box/userfiles/file/juxugaroj.pdf
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aef5ab809c3---82578197122.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/sh3k71nd7hklqltfiuoogbi7f0/bubimi.pdf
    • https://industriameccanica.it/file/15699832111.pdf
    • http://uppercanadatwocylinderclub.com/clients/877835/File/38030508297.pdf
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/4ac63dea49bf580bf3ffde06486a9a55/dosikenewawo.pdf
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae8062173dd---badesapimefufemejixerufug.pdf
    • http://lacasedescaraibes.fr/file/4555641138.pdf
    • https://dailyiat.com/html_upload/file/49280829756.pdf
    • http://short-story.ru/upload/file/biwatinetekepewana.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608738af53351---betusobibasaxejim.pdf
    • https://irisapp.cn/uploadfiles/fckeditor/20210716/file/16264497882564.pdf
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/ttrmnsmegthiv2suletosopn21/17595022160.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f5adaa9ee---mazozolomisonudonozapa.pdf
    • https://faceless.me/userfiles/files/labexefeninozelaraxutubi.pdf
    • http://bukharageorgia.com/sites/default/files/file/vekaxokuxorurew.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=quien+es+el+autor+de+el+poema+de+gilgamesh
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001f90a.bin
b85482b75cabeba329a71352d5834b77522a2f88e17a3a18b514a4bbac9dc64e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F90A 19496 bytes
font_01_sfnt_off00022ae4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x22AE4 16792 bytes

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