Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6233417794c7288…

MALICIOUS

PDF

90.7 KB Created: 2021-09-10 21:21:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: fc8baa50ff22f835c9d3e456710b285a SHA-1: 80183fc85577403fcc0e7bb8e06b1171b51d5613 SHA-256: d6233417794c72881985744d93dce66b9059fcc50ca1882357f3fe42051754c4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://thietkewebbacninh.com/webroot/img/files/99690977359.pdf In PDF document text
    • http://chiari-web.com/ckfinder/optimist/files/tegadug.pdfIn PDF document text
    • http://uteambio.com/upload/files/roxojemomasilodeg.pdfIn PDF document text
    • https://pepsima.biz/files/file/vimubijewafijemekaw.pdfIn PDF document text
    • https://ms1oke.com/contents/files/daxoxogubuseda.pdfIn PDF document text
    • https://fleuriste79.fr/ckfinder/userfiles/files/ludadonirezivorodidese.pdfIn PDF document text
    • http://studiolorenzino.eu/userfiles/files/tofipijifonexekuvobaxadi.pdfIn PDF document text
    • http://www.ags-sib.ru/ckfinder/userfiles/files/36190247449.pdfIn PDF document text
    • https://10s317.com/uploads/files/202109050928464600.pdfIn PDF document text
    • https://aljuboori.com/userfiles/files/54944037937.pdfIn PDF document text
    • https://wroclaw-effatha.pl/grafiki/file/wumapeferidanezi.pdfIn PDF document text
    • http://5m-tti.com/uploads/image/files/71519154073.pdfIn PDF document text
    • https://himalmanpower.com/ckfinder/userfiles/files/vijuraxozulesopoz.pdfIn PDF document text
    • https://autohausnschmidt.de/userfiles/file/bagaramagapodavonurugu.pdfIn PDF document text
    • http://oppedisanorobertosrl.com/userfiles/files/tinonuva.pdfIn PDF document text
    • http://chroscina.com/userfiles/file/28604894449.pdfIn PDF document text
    • http://rebeccaosborne.com/uploads/46447543281.pdfIn PDF document text
    • http://luyenthidhcanhsat.com/Images_upload/files/29204871387.pdfIn PDF document text
    • http://traktor-tv.de/sites/default/files/file/kexukaruvojisujojud.pdfIn PDF document text
    • http://france-ex.com/images/blog/file/45000989189.pdfIn PDF document text
    • http://iranjobex.com/cache/fck_files/file/19585671717.pdfIn PDF document text
    • http://aven.su/userfiles/file/nowalug.pdfIn PDF document text
    • http://xiangzhuan.tw/upload/files/pabanizefojizexogetadofu.pdfIn PDF document text
    • https://myreply.mobi/snappshott/editor//file/posodinonuranaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=matthew+reilly+books+pdf+free+downloadPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC48 18108 bytes
SHA-256: c9ef12f12ffe61da017c842d911e17c55aecc824dc9ea86f00374f6ccbdf1f34
font_01_sfnt_off00012b25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B25 11020 bytes
SHA-256: 39b2e2666947dcbbbcb727bda29df041ab3cb461d415c2616702816d21fb86b2
font_02_sfnt_off0001448f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1448F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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