Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd046d944e568fbb…

MALICIOUS

PDF

59.8 KB Created: 2021-09-01 23:11:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e64e354209ac10ef57189c12e98a9131 SHA-1: ba944d9d71e76ec9f944329c444aca6e68a77ff7 SHA-256: dd046d944e568fbb42a7a41464fda5fc15b0d96b4198cc6b41c6f68d445d60c4
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely intended to lure users into downloading further malicious content or visiting phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan. The file's structure and embedded URLs suggest it's part of a phishing campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6909

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://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160924e8507f4c---pupasoj.pdf In PDF document text
    • https://okazdedziecko.pl/_files/Media/file/nuxirafenomavisojamufedaw.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3892d2598---52046748332.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f99084c800---fekituba.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/32131848d6f1a713d467b8f006f495a4/98526604448.pdfIn PDF document text
    • http://sharon-barron.com/userfiles/files/35214435701.pdfIn PDF document text
    • http://mediaworld.pro/ckfinder/userfiles/files/parelapilirafaperole.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/12438970110.pdfIn PDF document text
    • http://associazionemillesogni.it/userfiles/files/naboweri.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/1a8b5d403fba8b15a509b38bdd1e0b6b/zuzutegobazinebowokape.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/05382bba79c95a5e89030ec24384e589/gotag.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/c69e1222374b009222284cd6397c3b73/45149405289.pdfIn PDF document text
    • https://highendteen.com/userfiles/files/13338296779.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160dbef1bc6839---2218614871.pdfIn PDF document text
    • https://lenaoyunlar.com/calisma2/files/uploads/zofejobaju.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e5902de7a---xakasazema.pdfIn PDF document text
    • http://hnkingdee.cn/Files/file/2021526181937.pdfIn PDF document text
    • http://rsentco.com/upload/file/pobedepepemulorovaromepaz.pdfIn PDF document text
    • http://sergeybazarov.ru/file/80706336766.pdfIn PDF document text
    • https://cissud.it/uploads/ck_editor/files/62832306673.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b52f761cc38---14536366466.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=story+the+lotteryPDF link annotation

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