Malicious PDF — malware analysis report

Static analysis result for SHA-256 d07d984feb3ac200…

MALICIOUS

PDF

65.9 KB Created: 2021-09-18 08:03:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: def68159d2b43226ca82269f84c2fd57 SHA-1: 23c28dc5a856b7418038eb1e2299a24fc5c703a6 SHA-256: d07d984feb3ac200a6bd574bae9d3357d788789bd28232fe447e2406f408dab3
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs pointing to external sites, many of which appear to be part of a link farm designed to obscure the ultimate destination. The PDF's structure and the presence of external URIs suggest it is intended to redirect users to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7778

Heuristics 4

  • 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
  • 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://medvor.ru/uplcv?utm_term=pokemon+ultra+moon+citra+download+android PDF link annotation
    • http://milwaukee.center/userfiles/file/59775832145.pdfIn PDF document text
    • http://cen7dias.es/userfiles/files/pefezibesevelalusapodibut.pdfIn PDF document text
    • https://jazykovytabor.topenglish.sk/app/webroot/gallery/files/zesiga.pdfIn PDF document text
    • http://thienlongadv.com/upload/files/mutageragudorarimo.pdfIn PDF document text
    • https://atvatextile.com/upload/ckfinder/files/firuro.pdfIn PDF document text
    • http://thestarbusan.com/FileData/ckfinder/files/20210903_4E8F074BBFD85C7A.pdfIn PDF document text
    • http://immobilieninvestors.com/userfiles/file/56229114705.pdfIn PDF document text
    • https://xaydungdonggia.com/app/webroot/files/images/pages/files/40458240687.pdfIn PDF document text
    • http://canxetaianhduc.com/images/file/62508949456.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/02bc8082c59277f8be4830b0730f4351/50097707738.pdfIn PDF document text
    • http://xsjsbzrw.com/uploads/files/mawazikedid.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/9687d6a1250de34933ffdad11dda613a/nakawobadapejefu.pdfIn PDF document text
    • https://svingenieria.cl/userfiles/file/80568622459.pdfIn PDF document text
    • https://maviet.vn/upload/files/ziviru.pdfIn PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/lupiwed.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/48273255909.pdfIn PDF document text
    • http://mega-treid.com/userfiles/files/mifenevegamafovemufi.pdfIn PDF document text
    • http://chinamakina.com/userfiles/file/zuraradagi.pdfIn PDF document text
    • https://parlagame.net/calisma2/files/uploads/jarapolik.pdfIn PDF document text
    • https://dentalrud.com/userfiles/file/pobanukenovaker.pdfIn PDF document text
    • http://avvocatogiuliani.it/userfiles/files/58026488628.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/61678799613f8e7240a90.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b7b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cfcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFCC 10640 bytes
SHA-256: 19429cf9d01009bc95feb17f30e0babd3dbae9c86c9534928f39d08e2ec99fe4

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