Malicious PDF — malware analysis report

Static analysis result for SHA-256 94e35e51a37ba94a…

MALICIOUS

PDF

71.4 KB Created: 2021-09-17 12:25:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1ffb39529e8b6961dcd96d97a53b62de SHA-1: d4f609780796377c1bdd0adbde840759f470a360 SHA-256: 94e35e51a37ba94a38b39ec9ea400ca108a7f2a4cc7c788cd7b2e1ebb4fc762f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs, including one pointing to 'garglob.ru' with a 'mod apk' query, suggesting a lure for potentially unwanted applications or malware. The PDF structure and embedded links indicate it's designed to redirect users to malicious sites, likely as part of a phishing campaign or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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://garglob.ru/uplcv?utm_term=mod+apk+avakin+life+unlimited+money PDF link annotation
    • https://angelsforwarriors.org/userfiles/files/99548404281.pdfIn PDF document text
    • https://tolgyesvolgy.hu/userfiles/file/bakinor.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/c6qqnmsbo1io55n8ci6r5k3g8l/12726049603.pdfIn PDF document text
    • http://hotelbellevuepalermo.com/userfiles/files/tumijotepabozaruzolarum.pdfIn PDF document text
    • https://hoakhanh.vn/uploads/image/files/23703576912.pdfIn PDF document text
    • https://dintek.eu/uploads/file/52607727984.pdfIn PDF document text
    • http://word.mn/uploads/assets/14464559311.pdfIn PDF document text
    • http://nowator-zpu.pl/userfiles/file/kilutodexezuzo.pdfIn PDF document text
    • https://k-barrierfree.com/FileData/ckfinder/files/20210905_70AF34A18692D603.pdfIn PDF document text
    • http://kawana.tech/userfiles/file/ginujagovenef.pdfIn PDF document text
    • http://vamaconsulting.sk/userfiles/file/14815505636.pdfIn PDF document text
    • https://markiza-trade.ru/admin/ckfinder/userfiles/files/wuxalibinusabewatuzefufo.pdfIn PDF document text
    • http://ckrestaurantgroup.com/ckfinder/userfiles/files/zikelu.pdfIn PDF document text
    • http://2rent.gr/userfiles/file/lonedififif.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/juranejemuvolarolibopal.pdfIn PDF document text
    • http://zamgph.com/uploads/file/040853452894.pdfIn PDF document text
    • http://vivaibonomo.it/userfiles/files/90573749481.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/niziripomi.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/to1ij58lis1a4c4u2a20ucki0u/55493106646.pdfIn PDF document text
    • https://aparcaderoshaddaichile.cl/uploads/images/files/nogobusasadizaruz.pdfIn PDF document text
    • https://mcdelandes.ca/uploads/file/disoguke.pdfIn PDF document text
    • http://ux-school.ru/files/files/18655716474.pdfIn PDF document text
    • https://panificioilcavaliere.it/userfiles/files/59639026683.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/guzawipusujexegif.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_off0000b648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB648 15876 bytes
SHA-256: b4510267ecb82850de487c600ed5ed16130f2b20c2d11c06b5ceb9bdae9c9997
font_01_sfnt_off0000deed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF704 10756 bytes
SHA-256: 254e351acb6877614586db59c1664c3cef22710a744ac25daae7ce5e7805cda2