Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d35f26b6cd17a85…

MALICIOUS

PDF

86.6 KB Created: 2021-09-22 20:47:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a3cd511ad55d2cdc43379ed1460690b4 SHA-1: 834ac813159dc6761e30542c9b5bb42b88fbbb40 SHA-256: 5d35f26b6cd17a853a356afc76a93e1f0b3d608f3479a4e28be567291cce618d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of numerous embedded URLs suggest the document is designed to redirect users to potentially harmful external sites. No scripts were extracted, but the overall structure points to a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://ellev.fr/upload/files/gopepe.pdf In PDF document text
    • http://zzzwchem.com/upload/files/2594091218.pdfIn PDF document text
    • https://ichapps.peaceofworld.com/ichapps/ckeditor-ckfinder-integration/uploads/files/dezowonegesodej.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/161329c59490c9---9617482216.pdfIn PDF document text
    • http://makinsushi.com/uploads/files/43897211621.pdfIn PDF document text
    • http://fmafirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kiluwuf.pdfIn PDF document text
    • http://pro-group.ru/userfiles/files/71256308741.pdfIn PDF document text
    • http://ihdbd.org/upload/files/80220294105.pdfIn PDF document text
    • http://antonio-pelella.eu/userfiles/files/felemadazezazam.pdfIn PDF document text
    • http://selispin.com/calisma2/files/uploads/58644086435.pdfIn PDF document text
    • http://interroadholland.nl/userfiles/file/44499203622.pdfIn PDF document text
    • http://contelex.it/userfiles/files/24734245171.pdfIn PDF document text
    • https://yilmazlift.com/userfiles/file/rawoxagidisilopewuf.pdfIn PDF document text
    • https://kermanrooz.com/img/files/5132376579.pdfIn PDF document text
    • http://studiovalecchi.it/userfiles/files/gixamajoweboxinixukemejok.pdfIn PDF document text
    • https://optical-axis.com/uploads/files/202109131838408751.pdfIn PDF document text
    • http://klpa.net/userData/board/file/naboxadogenokeguxubuna.pdfIn PDF document text
    • http://fiorenzuolatrack.it/userfiles/files/36306208044.pdfIn PDF document text
    • http://dc-a0dcf319a153.breakthroughsport.com/userfiles/files/togakadoderozaxur.pdfIn PDF document text
    • http://nprofit.hk/userfiles/gidenalid.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/7ea02e1187ee983e64ed3e46a0323032/muwejeriza.pdfIn PDF document text
    • https://goldenlinejsc.com/userfiles/file/81484407906.pdfIn PDF document text
    • http://rfinshaat.az/userfiles/file/dufemozeraro.pdfIn PDF document text
    • http://stepasidemedical.com/images/uploads/file/maguwonuxirejusanuvuzosad.pdfIn PDF document text
    • http://thietbimaugiao.vn/Images_upload/files/90751337045.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/5e96a855c2589ce3fca5aab338cfd393/lowerapufiredama.pdfIn PDF document text
    • http://tjsyjdq.com/v15/Upload/file/202193057218803.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=spider+man+open+world+game+for+androidPDF 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_off0000ed20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED20 10736 bytes
SHA-256: d5a868ba6ca85047da3f3e2fa7aba8aff6f4b07582b72a9f4c2c2d73c048db23
font_01_sfnt_off00010592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10592 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011da4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA4 17984 bytes
SHA-256: cadc8c9358df1f8438dc48ee907e97842896dc1d49401fd4c0bff4b95fb3cd70