Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b0e049b74a9f8c2…

MALICIOUS

PDF

81.1 KB Created: 2021-09-11 16:28:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2f8af29b888d58f5f12fc142c1a2e6a5 SHA-1: 16e92e38ee3f68910d4fb0d04183385d994e3f61 SHA-256: 2b0e049b74a9f8c264018c20cef67d84a3c32182cf1d99065c92e7a743825341
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to suspicious PDF files, suggesting a link farm or redirection mechanism. The PDF structure and embedded content, despite being heavily obfuscated, are consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://kledingindex.nl/images/uploads/kamiwet.pdf In PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16132798605cc5---84601725304.pdfIn PDF document text
    • http://texinpack.com/uploadfile/file///2021090400413556.pdfIn PDF document text
    • http://agarimo.com/archivos/archivos/nelakazuku.pdfIn PDF document text
    • https://xn--z4qq44i.tw/upload/actfiles/ponowakijoju.pdfIn PDF document text
    • http://sapientgenerator.ru/files/userfiles/files/tosegeneruloli.pdfIn PDF document text
    • https://viceda.com/userfiles/file/rupaxogawefepojimiropozi.pdfIn PDF document text
    • http://donleroy.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zesebuvurokotuzugosasuje.pdfIn PDF document text
    • https://vietucmould.com/img-vietuc/files/sonureke.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612eeaaba6e22---75516537427.pdfIn PDF document text
    • https://qualitygums.com/userfiles/file/zalurumapowuvonuf.pdfIn PDF document text
    • http://goldway.jp/upload/board/file/lamukepumo.pdfIn PDF document text
    • http://thelonerangerfanclub.com/ckfinder/userfiles/files/kivolanubifi.pdfIn PDF document text
    • http://moscowfashion.net/content/xuploadimages/file/99397486533.pdfIn PDF document text
    • http://canyonmeadows.org/userimages/zobozizatifanos.pdfIn PDF document text
    • http://kernenshepler.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lugamapew.pdfIn PDF document text
    • http://nhatrangpalace.net/app/webroot/upload/files/20074254323.pdfIn PDF document text
    • http://nhungbaithuocnam.com/img-tvdl/files/gusebazagirepajenolutizow.pdfIn PDF document text
    • https://cuichi177.com/uploads/files/202109031918387189.pdfIn PDF document text
    • http://romanasulcikova.cz/userfiles/38769090209.pdfIn PDF document text
    • http://aven.su/userfiles/file/jixak.pdfIn PDF document text
    • http://bigbazar.cz/is/images/FCKeditor/File/leburotosir.pdfIn PDF document text
    • https://fu-ko-property-agency.com/webroot/editor-uploads/files/duduwisoligomavujebumuj.pdfIn PDF document text
    • https://hostsolutions.ro/app/webroot/files/userfiles/files/86931123579.pdfIn PDF document text
    • https://turismo-galicia.es/ckfinder/userfiles/files/fisunedepaboxesarizi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+build+a+custom+launcher+in+android+studioPDF 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_off0000da2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2B 10952 bytes
SHA-256: 874a598a71584b639c47f3a2580d02fd09ad5e516aed7f751eba08990760d496
font_01_sfnt_off0000f356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF356 16608 bytes
SHA-256: ddca5bc945701eda1c365dc79a4a7879a2c37192053efdaebbcf5053fd759615
font_02_sfnt_off00011ebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EBD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1