Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0f609075d3bf7c7…

MALICIOUS

PDF

84.2 KB Created: 2021-09-19 05:34:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3881ac780ee95946d51d458f0fabb6eb SHA-1: 8d22f5b79e386011520c46205f850cea0302c919 SHA-256: e0f609075d3bf7c76363505dd7ccb668b8f06ed5102c89906af14fedaac04361
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious. Heuristics indicate it functions as a link farm with numerous embedded URLs, many pointing to disposable domains. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically identifies this pattern as a tactic for distributing malicious content or phishing lures. No scripts were extracted, but the overall structure and URL distribution strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://abc-tel.ru/data/File/kajunoxanani.pdf In PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613705215b424---peguda.pdfIn PDF document text
    • http://dienlanhhuubinh.com/upload/files/dowegopipewibovazagugir.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/wogevuxogodokafitiposa.pdfIn PDF document text
    • https://alebusph.centralcms.cloud/galeria/files/8198739816.pdfIn PDF document text
    • https://bawauang.com/contents/files/winemoxiridopagim.pdfIn PDF document text
    • https://starfoil-mail.nl/uploads/wysiwyg/giromasomibin.pdfIn PDF document text
    • http://larben.cz/media/images/upload/file/15421975854.pdfIn PDF document text
    • http://lehnerkom.de/images/uploaded/file/sozefalitosixesug.pdfIn PDF document text
    • http://webbolt.fono.hu/data/editorfile/tewofuvirosomuv.pdfIn PDF document text
    • http://the-bom.kr/upfile/files/39304592210.pdfIn PDF document text
    • http://www.extramas.com/userfiles/files/sufazujem.pdfIn PDF document text
    • http://cansuyu.org/resimler/files/60690537820.pdfIn PDF document text
    • https://magatek.com/documents/file/mogepuxuva.pdfIn PDF document text
    • http://chipmax.in/chipmax/ckfinder/userfiles/files/zevinatelumetezopepafov.pdfIn PDF document text
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/90285276487.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/3617445833.pdfIn PDF document text
    • https://novamakine.com/upload/ckfinder/files/52577800244.pdfIn PDF document text
    • http://studiotecniconuti.it/userfiles/files/zuzagevubesisenol.pdfIn PDF document text
    • https://tennis-samara.ru/img/file/domimugogot.pdfIn PDF document text
    • https://aleemanschools.org/userfiles/file/77233109055.pdfIn PDF document text
    • http://ecogestval.com/userfiles/file/92792406089.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=be+to+modal+verb+examplesPDF 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_off0000e07b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f88d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF88D 19668 bytes
SHA-256: 944bc0d02aaef7ab5f3a2fd8fb03411ba1dcaddd8781f5c278ca161a3f874dce
font_02_sfnt_off00012ab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB6 10720 bytes
SHA-256: f299c4eeedc6047d09ece61af6fa9fef2075282a8dea2785cb3925a728de2276

Open this report in the interactive analyzer, or submit your own file for analysis.