Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5fed4944f821749…

MALICIOUS

PDF

62.4 KB Created: 2021-06-17 08:57:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9b00651c9fdb63c4f1d1877e9e1d5dc5 SHA-1: 3503268091c2d00b48fbd0a931a8c2c8a03a5ae5 SHA-256: c5fed4944f821749819c2630a3067a40d5441c16783c57deb5e117d108548d00
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, specifically identified as a phishing trojan by ClamAV. It functions as a link farm, containing numerous URLs that point to compromised CMS upload storage and disposable hosting, likely intended to redirect users to malicious sites. The document body, though heavily obfuscated, contains references to 'song lyrics' and authoring application details, suggesting a lure to disguise the malicious intent of the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://coretry.ru/uplcv?utm_term=fuloka+taroka+song+lyrics PDF link annotation
    • http://antonio-pelella.eu/userfiles/files/kasusazu.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/dac05d1e10475c3463e65fdd362da5fa/jumazopi.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/c25turk3bq4jb92hfnh31lih15/bogiluzevepabefidax.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/m9cdnkkmseo78fl9q1fm79n0ja/nevofiteziwivubi.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/6ba14d0d2b388886374021b2e770ff88/funadupen.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160ab2341ee643---pafiwuf.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c020267cfe6---sowupala.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/fefe99aba614935b138aabf8dbc8866f/dunizike.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160ae7d5eb17ef---lexopexonerixek.pdfIn PDF document text
    • https://harrisitalia.it/uploads/file/dozug.pdfIn PDF document text
    • http://e-skala.pl/userfiles/file/99353424439.pdfIn PDF document text
    • https://anandamsanyal.com/userfiles/file/lakixadirarit.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/c56152a5cd6146fb251943efa16be696/49702083333.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/oqtqk6q7cva1v2ugrdl91tfqv6/nudipowodetu.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5dd453dcf---6078489681.pdfIn PDF document text
    • http://bhs-class1957.com/clients/35434/File/dowoku.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8ED 5088 bytes
SHA-256: 0da8bb5367741ae73a776ae437b40db1bfb4ed724c9dbbb6bcda4077951367a3

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