Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c1ff991601636ec…

MALICIOUS

PDF

60.9 KB Created: 2021-09-16 12:27:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 408d804344ad6ed3b505161811c66e37 SHA-1: d1fd105abe238b3d5a5486968ac2d6bb2a47384e SHA-256: 2c1ff991601636ec23e4f850771bb0ee0a27e878e83c7e7b6b8fc25b908c1425
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, some of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm for phishing or malware distribution. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics confirm its malicious nature, with ClamAV identifying it as a phishing trojan. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of URLs like 'infrive.ru/uplcv?utm_term=don+2+download+full+movie' indicates a likely attempt to trick users into downloading malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5358

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 https://infrive.ru/uplcv?utm_term=don+2+download+full+movie PDF link annotation
    • http://copingconversations.com/userfiles/file/kutavowutegevalelowe.pdfIn PDF document text
    • http://mrtowing.ca/Lawyers/userfiles/file/jazonud.pdfIn PDF document text
    • https://soswzgierz.pl/web/uploads/files/jelelixiwone.pdfIn PDF document text
    • http://narnivet.com/userfiles/files/pinulevelugof.pdfIn PDF document text
    • http://www.johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/74361479826.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139acf3c386a---4783419318.pdfIn PDF document text
    • http://hortherbpublisher.com/files/upfiles/file/91558467996.pdfIn PDF document text
    • https://lompatjauh.com/contents/files/39614484468.pdfIn PDF document text
    • https://rosebankprimary.co.za/inc/ckfinder/userfiles/files/lomovafitetinulerofopoja.pdfIn PDF document text
    • http://starma.pl/files/file/37309034623.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/161408d780b088---jevuwagaja.pdfIn PDF document text
    • http://veszpremlizards.hu/_user/file/fuvufuxapaxolurabubuf.pdfIn PDF document text
    • http://chongthamnguoc.vn/img/files/pibapekusidov.pdfIn PDF document text
    • http://ingore.cn/upload/files/luwikadukifinoze.pdfIn PDF document text
    • http://szigmetal.hu/editor_up/fidipud.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/7611011598.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/dfa6a8321206e1cd017dbf7f9d2600d2/navej.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bf85c1194f---renimemexojobumu.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/vk0dm73usk1puo9ugjfbpmvrum/lufubuwuxufa.pdfIn PDF document text
    • http://gemcom.org/userfiles/file/67988881494.pdfIn PDF document text
    • http://candybeauty.vn/upload/files/sukudanizifijova.pdfIn PDF document text
    • https://rosewoodcity.org/nbloom/fckuploads/file/46254607644.pdfIn PDF document text
    • http://stoka-saarlouis.de/userfiles/file/kezeguwakewegiretif.pdfIn PDF document text
    • https://omnistopbollards.com/application/third_party/ckfinder/userfiles/files/mulugodaburobebes.pdfIn PDF document text
    • https://jager-ig.tw/up_photo/file/rexesivaperosadutekajup.pdfIn PDF document text

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