Malicious PDF — malware analysis report

Static analysis result for SHA-256 33e1b14d545f659d…

MALICIOUS

PDF

79.5 KB Created: 2021-09-15 19:08:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9cbd639f051afdc9acb5c3b3757b51b5 SHA-1: 8893fa8908e106c61627f4efebf11aa96c883510 SHA-256: 33e1b14d545f659ddf2b3d989d8b43c6f13d03498574f59256856551f6dd216a
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to disposable hosting and are likely used to redirect users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a strategy of creating a large number of links on low-reputation domains, a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://laborke.ru/uplcv?utm_term=shoulder+girdle+muscles PDF link annotation
    • http://trieuduong.com/images/Download/jefew.pdfIn PDF document text
    • http://maekalocal.com/Maeka/UserFiles/File/44776825768.pdfIn PDF document text
    • http://agrostroi-proekt.ru/ckfinder/userfiles/files/kasub.pdfIn PDF document text
    • https://digireg.es/upload/xinetedake.pdfIn PDF document text
    • http://foreverymuslim.net/home1/forevev3/public_html/foreverymuslim/upload/file/depaku.pdfIn PDF document text
    • http://tcsklife.com/filespath/files/20210903043227.pdfIn PDF document text
    • https://viessmannboilers.ca/fck_upload/file/fejijujonogomake.pdfIn PDF document text
    • http://tokyosushilohaus.com/uploads/files/rexojexagosigojofa.pdfIn PDF document text
    • http://www.pibmg.com.br/ckfinder/userfiles/files/files/lotorasikubegu.pdfIn PDF document text
    • http://polaryachtmanufactory.com/res/wysiwyg/file/komitofomev.pdfIn PDF document text
    • https://angelsolutions.ro/ckeditor/ckfinder/userfiles/files/14291776897.pdfIn PDF document text
    • https://malmospelmanslag.se/userfiles/file/22229954279.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161416d600bf9e---sewobinujezafafijidupo.pdfIn PDF document text
    • http://modamoda.nl/uploads/pic_lib/file/81169318325.pdfIn PDF document text
    • https://shoppingplanet.cityplanet.ro/ckfinder/userfiles/files/58363289859.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/a3d1424651bd57b936fd7868738afcab/tejabojitere.pdfIn PDF document text
    • http://www.chatanakonci.cz/userfiles/file/22737261256.pdfIn PDF document text
    • https://gancza-yacht.pl/userfiles/file/87108301368.pdfIn PDF document text
    • http://seednseed.com/admin/fckfiles/file/vasoledizow.pdfIn PDF document text
    • http://hyundaihungthinh.com/uploads/images/files/96074386671.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/jobenunevebopeji.pdfIn PDF document text
    • http://sriraghavendratemple.com/ckfinder/userfiles/files/zinesemujow.pdfIn PDF document text
    • http://tchid.net/userfiles/file/45879758510.pdfIn PDF document text
    • http://perfecturology.cafe24.com/upload/editor/imagefile/82810612826.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_off0000d5b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B7 10628 bytes
SHA-256: 3937b286d040cdf1faf737a2441a0dbadc5ea064f263f1cb7e2dddebf6681804
font_01_sfnt_off0000edbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBE 16664 bytes
SHA-256: 9dbec94dae26c6fd97e5f0e3c020b6253e6d030540badf7c7b92b7a92d3feed9
font_02_sfnt_off0001189c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1189C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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