Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1e084df55e471ce…

MALICIOUS

PDF

39.6 KB Created: 2021-09-05 01:14:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: fa80e5def70cea9bc6ffe8ff40804a2f SHA-1: 39373bc691fc40e42a280a17b21179df0c8cba23 SHA-256: a1e084df55e471ce9bbb4b9875909334d10f3a8bd35860e98fbb272d3189ca3d
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. The document is structured as an image-only lure, a common tactic to trick users into interacting with embedded links. The numerous embedded URLs point to compromised CMS uploads, suggesting a distribution network for phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8821

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 39 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160852607061de---barodikotamawududej.pdf In PDF document text
    • http://tzoetemondje.be/uploads/files/57182348177.pdfIn PDF document text
    • http://a-daily.jp/app/webroot/contents_img/files/66628403272.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/ab82781afc3a816d487262a887d122ab/43827972900.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/9e2b31f535e57a14114aae0895025890/17172437317.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/1e812ffce75ff31d5763ad735f0f4c9b/4779994775.pdfIn PDF document text
    • https://moveo-sport.pl/userfiles/file/85615294886.pdfIn PDF document text
    • http://vnationwide.com/userfiles/files/55749497117.pdfIn PDF document text
    • http://15881588.com/ckupload/files/46755559375.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/e411b92a79e7cc178408a811db68dbaa/lulotolofelawogiwiseg.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160915b13a4137---remub.pdfIn PDF document text
    • https://fullgame.hu/uploads/files/sumonek.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/menov.pdfIn PDF document text
    • http://bubb.cn/up_file/file/66885782229.pdfIn PDF document text
    • http://wittlich-luexem.de/userfiles/file/mupovizeguri.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/f574266f906bc9281a9e6c62c4f6874a/xemagaroxumubexi.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ccbc572a24f---futonowakij.pdfIn PDF document text
    • https://szud94.hu/img/sajatfile/files/53442374030.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=atlas+of+video+capsule+endoscopy+pdfPDF link annotation

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