Malicious PDF — malware analysis report

Static analysis result for SHA-256 36260d0d6a1fd18b…

MALICIOUS

PDF

60.9 KB Created: 2021-09-24 03:30:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 14214e7420420114cc4d6732bca08800 SHA-1: 5833d67c7217a412dac7eb785e477609fb23af6a SHA-256: 36260d0d6a1fd18b8b0d23fd51ccbf0b638ba35258868d73a24aea877cb45d2a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs, many of which point to compromised CMS uploads and disposable hosting. ClamAV detected this file as a phishing trojan. The ML classifier also flagged it as malicious. The primary function appears to be redirecting users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6398

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/8a76db5df83aa201fbb159bda0da4018/13976697220.pdf In PDF document text
    • http://revize-elektro.info/UserFiles/File/bezivusakutovimenofo.pdfIn PDF document text
    • http://labotinnghia.com/img/files/93963293507.pdfIn PDF document text
    • http://etenindex.nl/images/uploads/48523889341.pdfIn PDF document text
    • http://old.bgk-meshkova.com/ckeditor/ckfinder/userfiles/files/57460507792.pdfIn PDF document text
    • https://madhubanindiancuisine.com/nbloom/fckuploads/file/9073011001.pdfIn PDF document text
    • http://changrung.com/ckfinder/userfiles/files/45644877801.pdfIn PDF document text
    • https://ons-station.com/editor_upload/file/vavibeguwudi.pdfIn PDF document text
    • http://e-restauracion.com/app/webroot/files/uploads/files/35478136448.pdfIn PDF document text
    • http://veronikavilla.hu/userfiles/file/13149441783.pdfIn PDF document text
    • https://0955205219.jwa.tw/userfiles/files/lupijadinosinutanukuwawu.pdfIn PDF document text
    • http://logicparcel.net/uploadsEditorfile/80014315335.pdfIn PDF document text
    • http://ohxto.com/uploaded_files/userfiles/files/13146151262.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb1694efc1---mijikanomokipedokefi.pdfIn PDF document text
    • https://tele-video.ru/upload/files/munotexopelidegaj.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/rerunibuzan.pdfIn PDF document text
    • http://futureinfashion.com/ckfinder/userfiles/files/23441492932.pdfIn PDF document text
    • http://kimbuunguyen.com/uploads/userfiles/file/75882912690.pdfIn PDF document text
    • http://turatabor.hu/media/xokabitobon.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141d34ee2bac---kemavulawifasizozoze.pdfIn PDF document text
    • http://evo-models.com/uploads/userfiles/files/74680907396.pdfIn PDF document text
    • http://abpaluso.com/upload/file/mumitik.pdfIn PDF document text
    • https://mallorcaboom.com/res/wysiwyg/file/54874662317.pdfIn PDF document text
    • http://ckm-machinery.com/userfiles/files/fatukuvuzarukiduratabu.pdfIn PDF document text
    • https://qkon.ca/images/file/wiludez.pdfIn PDF document text
    • http://shamayachts.com/upload/file/85140869193.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/161425dc750711---13152269681.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=dragon+ball+z+season+1+episode+8PDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bbc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBC3 19360 bytes
SHA-256: 74fef763b3b19679e521e6a008a4b14059a97f37af3a8df54a45b7c28a11dabe

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