Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ae3152ef13d5b04…

MALICIOUS

PDF

81.9 KB Created: 2021-09-23 20:02:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: a748bb65b17bb200cdc3d7d48f840593 SHA-1: 716d3302e19acbbe14f28393140bde55f473cf7f SHA-256: 9ae3152ef13d5b047c63eb3f4504c95c91e788213632de82d4737022e0df906a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous embedded URLs, many pointing to suspicious domains, suggesting a link farm or redirection mechanism to deliver malicious content. The PDF structure and the presence of external URIs point towards an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://aptekainternetowa.net/_mdm_apteki/file/43259828320.pdf In PDF document text
    • http://liqaa-lb.com/files/userfiles/files/wirepozemopagolopowojize.pdfIn PDF document text
    • http://ebd.su/UFD/7623/files/videj.pdfIn PDF document text
    • http://www.southpointinstitutehowrah.com/admin/uploads/file/20361829461.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/wolelomer.pdfIn PDF document text
    • https://sesconbs.org.br/ckfinder/userfiles/files/pesek.pdfIn PDF document text
    • http://vetportonaccio.it/userfiles/files/falisewenuvumokijiti.pdfIn PDF document text
    • http://dxqzx.com/ckfinder/userfiles/files/20210921_160607.pdfIn PDF document text
    • https://lesrimaudieres.com/images/uploads/file/lemasojuta.pdfIn PDF document text
    • http://casaledellasignora.it/userfiles/files/66654567447.pdfIn PDF document text
    • http://canyonmeadows.org/userimages/72171881953.pdfIn PDF document text
    • http://songhandiban.com/uploadfile/file/2021091712471873499.pdfIn PDF document text
    • http://enidental.com/userfiles/file/20210910094746.pdfIn PDF document text
    • https://zhavezbozi.cz/data/file/ruzunafavonaluxize.pdfIn PDF document text
    • http://areopag-group.ru/sites/default/files/uploads/wazuxuvudexi.pdfIn PDF document text
    • http://prime42.ru/userfiles/files/97907066090.pdfIn PDF document text
    • https://www.hermanosvalerorecio.com/ckfinder/userfiles/files/rawalivutaro.pdfIn PDF document text
    • http://www.temaricerca.com/entry2013/admin/ckfinder/userfiles/files/15168505776.pdfIn PDF document text
    • http://ogledalata.bg/uploads/pages/files/40758842696.pdfIn PDF document text
    • http://camel-republic.com/media/userfiles/files/pufijoxiwiju.pdfIn PDF document text
    • http://forumcutuca.com/ckfinder/userfiles/files/65438244686.pdfIn PDF document text
    • https://denimder.org/resimler/files/20094563667.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/95681281090.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613838d8852b6---xigiw.pdfIn PDF document text
    • http://flamefitnessstudio.com/cewit/images/file/24621302111.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=unique+pattern+lockPDF link annotation
    • 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_off0000d97f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD97F 10544 bytes
SHA-256: 25eff64955fee55e56f160f8f3cd688646ab2201fcf59740003caa69c5deda97
font_01_sfnt_off0000f19a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19A 18400 bytes
SHA-256: e9e37582b1b7749368c98310edb04353994dea307bd0ad4cc09109bf8e96cd61
font_02_sfnt_off00012217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12217 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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