Malicious PDF — malware analysis report

Static analysis result for SHA-256 7594640e7ad4078e…

MALICIOUS

PDF

78.4 KB Created: 2021-05-29 19:56:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff4e324272a16a39d5e167c1fa601e74 SHA-1: c46e0b667ce15b664c976f369a0d169de549b792 SHA-256: 7594640e7ad4078ef794464c81e02d2ba6f2cc44810d302569b59e9698764590
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a link farm hosted on compromised CMS upload directories, suggesting it is part of a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the heuristics point towards a phishing attack disguised as a movie download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/747bfe1e095bbf7acc104b50e2209c18/43097229690.pdf
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606feae46a450---10991410940.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982a2c36f6b---pezifejujodopa.pdf
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a630a0cb497---jonavon.pdf
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/03ad759553a44e111392f9334a8bfbc7/14351775392.pdf
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/alcrgd1onnscesk4bik0jaaok7/92436181587.pdf
    • https://alice-immo.com/userfiles/file/dekumekude.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607516db8ff2a---rovunurezexij.pdf
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1606ec6a7c7948---sijege.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160940e71debc1---gipunulelorumer.pdf
    • https://baongochoa.com/upload/file/senemu.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a05aaaccce5---989646513.pdf
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/a5083c03f76b41067f0b59c96eb3292a/15599135175.pdf
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160719e5ba5f3a---doluluxusamefa.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160963b3bc317d---55249440004.pdf
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/8cf05b3e14533a6e5415bcdeb006d187/jivuso.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e950a6753---taxalefusajibatotug.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=shrek+1+pelicula+completa+en+espa%25C3%25B1ol+parte+9
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6ce.bin
082c89522e4251f0a814862fddf633b1dac669eb780a02580130c1f52bfffe84
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CE 3312 bytes
font_01_sfnt_off0000f2af.bin
ec87b27893fe563a1321f32c5cb7825638443ef7bc02070ccb9cdabfe27f09b8
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AF 5760 bytes
font_02_sfnt_off000105d7.bin
1a4f90375a08456a04433e0db3ad976a18258d45a7189b6790469d0916c442af
pdf-font-stream PDF embedded font (sfnt) at offset 0x105D7 11924 bytes