Malicious PDF — malware analysis report

Static analysis result for SHA-256 445ee0e1fc67d43b…

MALICIOUS

PDF

44.3 KB Created: 2021-09-26 03:27:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: e09f2bab428f75ec79ab165458f9b8d2 SHA-1: feb4a79405f903b8cba947dede4b3c44c61e240d SHA-256: 445ee0e1fc67d43b064f528e68e9e97c6a0bb28b6a798c5d1a807ef4a29703aa
124 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for link farms and phishing lures. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, suggesting the document's primary purpose is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5141

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ventilyatsia-v-sochi.ru/ckfinder/userfiles/files/ruxujexoja.pdf In PDF document text
    • http://mygiftltd.com/userfiles/file/lepurotipawanotupim.pdfIn PDF document text
    • http://frchem.cn/upload/files/62860163468.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/5517084769.pdfIn PDF document text
    • http://caffepontoni.com/uploads/file/47601636285.pdfIn PDF document text
    • http://synphabase.ch/upload/file/93059443021.pdfIn PDF document text
    • http://anninh247.info/upload/files/jowujutajisirabunulivepi.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/jeniso.pdfIn PDF document text
    • http://bielle-srl.com/userfiles/files/siritalaviredovini.pdfIn PDF document text
    • http://schokofontaene.de/idata/36286015352.pdfIn PDF document text
    • http://nriloan.jctoursandtravels.in/files/21526002754.pdfIn PDF document text
    • https://singhaniabrothersltd.com/ckeditor/ckfinder/userfiles/files/91846115715.pdfIn PDF document text
    • http://portalpr-b2b.es/img/user//file/_0698899001630686337.pdfIn PDF document text
    • http://thietkevang.com/upload/files/96996268778.pdfIn PDF document text
    • http://vibratingsieve.com/d/files/labodutowemijatajoxeg.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613eb7f99f2a1---didujejipavipizoteviz.pdfIn PDF document text
    • http://fourfoods.com/images/files/bijowisafojutowuge.pdfIn PDF document text
    • https://suksesunited.com/contents/files/63041038568.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613336fde8d9f---79765258263.pdfIn PDF document text
    • https://raiporjai.com/piceditor/file/fasemegunowefazaxagute.pdfIn PDF document text
    • http://projecthouse.bg/uploads/CKfinder/files/gitopogifuleboxifagedipa.pdfIn PDF document text
    • http://federicozucchettiarchitetto.eu/userfiles/files/69810374355.pdfIn PDF document text
    • http://vet-arrighicolangelicristilli.eu/userfiles/files/tijexuwepolirudizamo.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/91823889165.pdfIn PDF document text
    • http://kamerton.nl/clientfiles/48155168288.pdfIn PDF document text
    • http://escrima-rlp.de/userfiles/file/tifeleselulaku.pdfIn PDF document text
    • http://nemalipics.com/49287564701.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=change+font+on+text+messages+androidPDF link annotation

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