Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6cdff83bc66839c…

MALICIOUS

PDF

70.2 KB Created: 2021-09-20 22:45:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 28fdfeb55c938397ade21c1850551e27 SHA-1: 0496334440e3dd521f8e1c715978c2cc9e11e9bf SHA-256: f6cdff83bc66839ca3fd2cba80d4af4a7648a926845477af3bb98c410ca2ffe4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs pointing to disposable domains, characteristic of a link farm designed to redirect users to potentially malicious sites. The presence of external URIs and the link farm heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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=garena+free+fire+apk+latest+version PDF link annotation
    • https://stalbeckers.nl/userfiles/image/file/21214264335.pdfIn PDF document text
    • http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/99091987721.pdfIn PDF document text
    • https://deltaguvenlik.net/userfiles/file/13918815587.pdfIn PDF document text
    • http://karmakonnect.org/DrumiBhatt/karmakonnect.org/Final/ckeditorimage/files/12005463001.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/pbt49tv8jpk2fb7kvc3dbnte75/tozibakogetofurixubis.pdfIn PDF document text
    • https://bloomlight.pl/_bloom/file/72478454061.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139b7502a5e5---61542799568.pdfIn PDF document text
    • http://virus-safe-zone.com/ckupload/files/jizikadovajuzapovofoda.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/berefiv.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/makoxuroxurijesavewaj.pdfIn PDF document text
    • http://grafiport.com/userfiles/file/xolonogatigiresowejoduter.pdfIn PDF document text
    • https://ecoquimica.cl/dinamicos/uploads/file/59809521502.pdfIn PDF document text
    • http://parikshitconstruction.com/uploads/revotev.pdfIn PDF document text
    • https://girilawfirm.com/content_files/files/90193791023.pdfIn PDF document text
    • http://houselandia.ru/files/56360607682.pdfIn PDF document text
    • https://hanyauntuktesting.com/contents/files/82045682663.pdfIn PDF document text
    • http://abpjse.news-read.com/upload/files/luxogedoz.pdfIn PDF document text
    • http://baobianhkhang.com/upload/files/91525176755.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/53043963434.pdfIn PDF document text
    • http://karate-talence.com/newsite/userfiles/files/39382859567.pdfIn PDF document text
    • http://yeongwonenc.com/userfiles/file/mubivumosagi.pdfIn PDF document text
    • https://mimpishio1bet.net/contents/files/kozewegezuma.pdfIn PDF document text
    • https://cailux.lu/userfiles/files/78646856409.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_off0000b2d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE7 10548 bytes
SHA-256: 735ba7cb72237940cbd613f2b0da5c456b1c0307de5a4ff1d591484c6025d4aa
font_02_sfnt_off0000e31c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31C 15848 bytes
SHA-256: 2c2dec04fd2c3a76d45275ee49624b569d702a9f3cf176bd896817265ea28079

Open this report in the interactive analyzer, or submit your own file for analysis.