Malicious PDF — malware analysis report

Static analysis result for SHA-256 26a60d04955e4076…

MALICIOUS

PDF

86.1 KB Created: 2021-08-07 00:06:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e38093716f291146b52f48add89fa439 SHA-1: 3b94c5d5c9dff3c3537f1ac9871abc8f95911b4f SHA-256: 26a60d04955e4076ac4f83780f8a4a0ee1beecbc8c6650b8c282699fa0481c26
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that likely lead to phishing sites or further malware downloads. The presence of 'utm_term' parameters in some URLs suggests an attempt to track user engagement with potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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
  • 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://infrive.ru/uplcv?utm_term=hitman+sniper+all+unlocked+mod+apk PDF link annotation
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/1c6c5b4ae95255a18fd6066df3c6fa87/seneledatudibi.pdfIn PDF document text
    • https://investmentskillsgroup.com/images/userfiles/file/pusetefijezomadefiteb.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/05sne3iroo4fb3nmp61vtt8tu5/tagixag.pdfIn PDF document text
    • https://kibledergisi.net/resimler/files/71252778408.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e7010f1f6---95323744611.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6115e3854---30537712791.pdfIn PDF document text
    • http://nakatka.com/files/file/11069772465.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798fa7500bb---88615997721.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/75214411345.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16090f120515c5---46425811288.pdfIn PDF document text
    • https://xenang-mitsubishi.com/fckupload/file/wibuvakisedikaxejiz.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1609f033771a3e---99836402581.pdfIn PDF document text
    • http://sowa-architekci.pl/userfiles/files/revidodin.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/25d4189c1146bdab7797ef4814956e2e/peberetorir.pdfIn PDF document text
    • http://zonwering-belgie.com/ckfinder/userfiles/files/lisobosapejetizatojeja.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/20c0b711808678bca8fc17cf36a0e25c/98816618350.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/a3a01a3325a2e2ef6844abff881ca61a/nivenogobuzomevu.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5d45d41db---livofalojisekenizepisifi.pdfIn PDF document text
    • http://ballstonfamilymedicine.com/clients/861402/File/93636977079.pdfIn PDF document text
    • https://gomaihoa.net/upload/files/76403999223.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c07f8025460---kodixagaruxeduv.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079125da01ff---6689352528.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5ddc19de3---nilurapevenoxonatolar.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB47 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10359 17472 bytes
SHA-256: c756946ac5a010dbb6e0705564a92ac65ffb1abff7db5f1cb9a48ce6fff2f410
font_02_sfnt_off0001314a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1314A 10860 bytes
SHA-256: 7aad79d4a3311f2e6a23738a456f4363f7520f765b59f519435c0739ef68f62b

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