Malicious PDF — malware analysis report

Static analysis result for SHA-256 2200dd4fd3ce696e…

MALICIOUS

PDF

90.1 KB Created: 2021-09-15 18:21:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 195eb17dea2f377ce1a3421d5a9a1c38 SHA-1: e506b50e531ed8f4cd54a2b143d7a3b1a477d2ef SHA-256: 2200dd4fd3ce696e55ebd155580844c709e09bde728ec05ea9dd260140325918
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with heuristics indicating it functions as a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • 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
  • 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://oniceh.ru/uplcv?utm_term=best+game+in+2021+android PDF link annotation
    • https://cvsc.co/userfiles/file/52938561684.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16141ac38e782c---29984823352.pdfIn PDF document text
    • http://parikshitconstruction.com/uploads/90337348449.pdfIn PDF document text
    • https://sma-dfgg.org/site/admin/file/41112371460.pdfIn PDF document text
    • http://volkshilfe-ktn.at/images/content/files/tutetateligodudut.pdfIn PDF document text
    • http://iwayman.com/uploadfiles/file/2109060654418801849y1ny5.pdfIn PDF document text
    • https://rh4-h1tapi-turbo.com/contents/files/ruwonugizoma.pdfIn PDF document text
    • https://0924055971.com/uploads/files/202109130621563188.pdfIn PDF document text
    • https://sanghvicranes.com/staging/media/10156666684.pdfIn PDF document text
    • http://www.barbazan-debat.fr/ckfinder/userfiles/files/wuwotava.pdfIn PDF document text
    • http://molenat-energies.fr/molenat.com/images/editor/file/viluwer.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/20766124562.pdfIn PDF document text
    • https://longhoang.vn/upload/files/sikonizugofoberixiv.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/223e1c0387197c52e88bb3d3ec7e5324/gotitasolidisonox.pdfIn PDF document text
    • http://parateam.cz/file/tafelopasogamolufuvobi.pdfIn PDF document text
    • https://winstar-tools.com/UserFiles/editor/file/80333098441.pdfIn PDF document text
    • http://erfaspot.com/resimler/files/17254579051.pdfIn PDF document text
    • http://seghers.kr/data/editor/file/1872527407613d8e9e0059a.pdfIn PDF document text
    • http://centronegozi.com/public/89216219892.pdfIn PDF document text
    • https://www.zolmedis.lt/ckfinder/userfiles/files/32549427327.pdfIn PDF document text
    • http://zonwering-nederland.com/ckfinder/userfiles/files/42981474203.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/e9b7a727ac2c95dad33972eb93814201/koziwuginoduwasesunekufa.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_off0000fa70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA70 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11287 10892 bytes
SHA-256: 2d5e4bdb9afa8a2aa8d77360e118763d42ce0c37116929aa88a1bb73bba5153d
font_02_sfnt_off00012ba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA0 18248 bytes
SHA-256: 7e6e570d31b86cadcf2e2661750a450a2eb9d49624364d2e3d456a72c88ef3cd

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