Malicious PDF — malware analysis report

Static analysis result for SHA-256 694599e127a778f0…

MALICIOUS

PDF

58.4 KB Created: 2021-05-21 17:25:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 93a43f6d255a7ed95d3af63974e9f81f SHA-1: b62b14a64b80d59e373213ddf37d7ed0d392e118 SHA-256: 694599e127a778f03a289d305d182a249f38dbdbd9642e674602a894f749e3e4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. It contains a link farm pointing to compromised WordPress upload directories, likely intended to distribute further malware or conduct phishing. The document body, though heavily obfuscated, appears to be a lure related to popular movie content, aiming to trick users into clicking the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9721

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 https://catamma.ru/uplcv?utm_term=fast+and+furious+9+full+movie+subtitle+indonesia+lk21 PDF link annotation
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a27878af740---15100948928.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160885314f19f5---gexonerakodixuf.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3e80d98d6---82100431423.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/30885830052.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/raperulazaligugoduw.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/f4999e2d6c31eb87d5b4f2ee48ddd5dd/xojelepalulukuwerumiredul.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d31ad8f7e5---nadomixugak.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/6kpmivtsugd6m2sv85e3qgssqu/jivinewonose.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd79b5c038---suzifar.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/7df98be968faac3ec9be4cbc8491e218/jogomodutepomani.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b763c29322---bojegenifarofovob.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/25b376ada7da8aa135180822aa4e39c7/bojelenelufuxexixiworuk.pdfIn PDF document text
    • http://dermalab.pl/userfiles/file/ruvejodawom.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/c7cef60d2a3dad342258b74564958b93/50875348540.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/493a7be861977c574f413a09a1a6afa2/75396680299.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000daeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAEB 5612 bytes
SHA-256: cd1f6e9c318b717fc1016bdf0fcfd6c8b2cac5b5f0d095d9fe09e498045e2219

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