Malicious PDF — malware analysis report

Static analysis result for SHA-256 d27726b2d4c52b1f…

MALICIOUS

PDF

48.0 KB Created: 2021-07-01 15:11:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 34d63e8234c6ced5b2759c10e0a23852 SHA-1: 5a205f4f01a469d3db51e96c444c6a166c0e00a6 SHA-256: d27726b2d4c52b1fb9d770918ba0f532b8d874690fd3b81dd73ce76abc905d30
154 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs that point to compromised WordPress sites and other disposable hosting. These links likely serve as a link farm to redirect users to malicious content, such as phishing pages or malware download sites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a non-clustered link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8493

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 http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b74b55dc457---58099576187.pdf In PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ca4d1f69d---46595843327.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e9f9cc37d---wugigonur.pdfIn PDF document text
    • http://dailycan.com/userfiles/files/nodalorulavupisudavanimor.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/tutixudigudefuvevisat.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5fee3c19ac9f1e4ca04801bfd7f5de14/tijapavovef.pdfIn PDF document text
    • http://alkanboya.com/files/file///sobugukodukefojeb.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/rujafaso.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/roropujixujej.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/3af146f498bd06297c31167ee429ce65/govemizesegugidetubune.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/469b1fae0e40dcd69030d76fdff416f8/24819981567.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/a7pct99naef56hudfhhprv8r70/xovikedu.pdfIn PDF document text
    • http://ibiforstarlight.org/clients/3/3c/3cfcca4e360ca8807b7dd7d6e7cbeae0/File/26005163754.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/5srt4ss6g9ik6tca1s4mcg75o3/93045023553.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16086b947f01e3---timefulisijabasovakoguxi.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/0c98ee265843745e46044be7a943fb85/33965014739.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b516ba09459---figenox.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16078286117bcd---98770414050.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/oebob03if6a6uaq0uii4ed5vsf/29800988858.pdfIn PDF document text
    • http://huile-de-nigelle.info/userfiles/file/riwezafojoliwomaligud.pdfIn PDF document text
    • http://dmhu.eu/uploads/uplib/file/zofowinatexaburenirofi.pdfIn PDF document text
    • http://cdmvt.cz/sites/default/files/64150463826.pdfIn PDF document text
    • https://securitydm.com/slicice/file/52299458282.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/4n9etvoha0lgfmtkj8n0g9q3rm/tisaxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=perfect+soft+boiled+eggs+from+cold+waterPDF link annotation

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