Malicious PDF — malware analysis report

Static analysis result for SHA-256 76e1fd6ddc1e5675…

MALICIOUS

PDF

79.6 KB Created: 2021-09-18 05:46:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 773ed2b312c384568b7f0163457731bc SHA-1: a4e0f1131b57d7937a6ab490f884638bfe0c5b3c SHA-256: 76e1fd6ddc1e5675661f594d7fcf33dacbfd09df9c77dd8ae1fc695d238c0a93
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and multiple external URIs, including one pointing to a raw IP address, suggesting it's designed to redirect users to potentially harmful sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the idea that this PDF is part of a campaign to distribute malicious content or phish users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9005

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://drafthe.ru/uplcv?utm_term=u+substitution+rules PDF link annotation
    • http://biplano.eu/userfiles/files/bonuluxagebaw.pdfIn PDF document text
    • https://kratky.eu/files/file/rometokezajolu.pdfIn PDF document text
    • http://bebaldebaran.eu/userfiles/files/gijutotezavebu.pdfIn PDF document text
    • http://7166867.ru/ckfinder/userfiles/files/boxadej.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/nuxuwovulutoniwafiginu.pdfIn PDF document text
    • http://liveisagenix.com/ckfinder/userfiles/files/97334442836.pdfIn PDF document text
    • https://datxeninhbinh.com/data/dulieu/files/7574443374.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/xuniguluzenefawaw.pdfIn PDF document text
    • https://globaldreamindia.com/webcms/file/dirabitogugibur.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16136bae6e260e---xumopi.pdfPDF link annotation
    • http://le383.com/uploads/files/waxugubakiwezav.pdfIn PDF document text
    • https://treasurehunterdetectors.com/ckfinder/userfiles/files/tetujabo.pdfIn PDF document text
    • https://uroci-kursove.com/userfiles/file/51126928792.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/3c15c16d9adf653f0f2ca17d871f4b70/mesisiwavujesoje.pdfIn PDF document text
    • https://artbynela.com/uploads/file/79597974054.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/tizesufumijapulon.pdfIn PDF document text
    • http://yarpb.ru/pic/userfile/piwanewifeneb.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/75169249978.pdfIn PDF document text
    • https://ayurmitra.com/files/file/vuwaliwaba.pdfIn PDF document text
    • https://phucatgarment.com.vn/ckfinder/userfiles/files/juxinawugapijujafe.pdfIn PDF document text
    • http://haraj-alqunfudhah.com/userfiles/file/39346069486.pdfIn PDF document text
    • http://burningspearmarketplace.com/js/ckfinder/userfiles/files/22314669321.pdfIn PDF document text
    • http://tbeaindia.com/userfiles/file/vilukawiwiniw.pdfIn 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_off0000d6e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eefa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFA 10184 bytes
SHA-256: 38b6b4817c1d6f810ea062bcb4b12980a538eadbd78d4c706b5f4411f5cb65db
font_02_sfnt_off000105eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EB 19844 bytes
SHA-256: 16e4acccf67ff8afef1fdaeb207b521f607699aea36483815ab521f5ec8e9e1f

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