Malicious PDF — malware analysis report

Static analysis result for SHA-256 db15c9239a952041…

MALICIOUS

PDF

73.3 KB Created: 2021-09-21 14:09:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5e79dfd6c306a66113b9b60bed3fdf05 SHA-1: aea1c630ccc04895369fab6cf1390a87133e2732 SHA-256: db15c9239a95204197deee0cadc248b43da544e2cceca978208c198b6f71190b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous external URIs pointing to disposable domains, combined with the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic, suggests this document is designed to redirect users to potentially harmful content. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://zopos.zohukum.com/ckfinder/userfiles/files/xekojejiluxufanuxunowo.pdf In PDF document text
    • https://triangle-electronics.com/assets/userfiles/file/geximitipon.pdfIn PDF document text
    • http://agriturismoilnoceto.com/userfiles/files/67250817762.pdfIn PDF document text
    • http://gardena.crazyrockinsushi.com/uploads/files/9134934416.pdfIn PDF document text
    • http://peneleos.pl/userfiles/file/jisixamoguketovo.pdfIn PDF document text
    • http://airsoft1.ro/files/file/38892311604.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/nenagofujesina.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/53061202970.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/vegaruzuritag.pdfIn PDF document text
    • https://mosconi.net/userfiles/file/tatidatisosegifi.pdfIn PDF document text
    • https://ebal.ro/app/webroot/files/userfiles/files/32272747662.pdfIn PDF document text
    • http://studioriggio.it/userfiles/files/16922560896.pdfIn PDF document text
    • https://home-consult.lu/userfiles/files/14614040102.pdfIn PDF document text
    • http://aumnat2car.com/ckfinder/core/connector/php/upload/files/bepuxaripuxin.pdfIn PDF document text
    • https://expomediainc.com/upload/file/sabekodavurimawerine.pdfIn PDF document text
    • http://synergienetwork.net/userfiles/file/gegizanetefinatibiladifi.pdfIn PDF document text
    • https://ags-car.com/upload/files/nugikogunajurip.pdfIn PDF document text
    • http://imhome-listings.com/userfiles/files/dafudomivuvo.pdfIn PDF document text
    • http://natur-pet.cz/webpagebuilder/ckfinder/userfiles/files/busunesezudofim.pdfIn PDF document text
    • http://paulgraphics.paulsfashion.in/files/31055359417.pdfIn PDF document text
    • http://artwatch.ru/userfiles/file/rewojokolizazataxukelexam.pdfIn PDF document text
    • http://sibinetweek.ru/userfiles/file/80164148779.pdfIn PDF document text
    • http://mashhadgardi724.ir/basefile/mashhadgardi724/files/52128674713.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=android+studio+try+catch+examplePDF 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_off0000bb06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB06 11076 bytes
SHA-256: fac724af56623de154fc10b789b5e140f706a88e78729e171f1f5e8468156748
font_01_sfnt_off0000d4bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCD 16608 bytes
SHA-256: 0c022addc80fee7fc1868db3fbe7b8c76054e7e84f6a7b352eaa17a95c2a9258

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