Malicious PDF — malware analysis report

Static analysis result for SHA-256 003ed5009cdc76a1…

MALICIOUS

PDF

73.2 KB Created: 2021-09-11 16:38:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 91656be0247245f463c09e2e26849b48 SHA-1: 459444efacebd2ef741f08fceff2b5e3b25f66b4 SHA-256: 003ed5009cdc76a1384f7c64450c392bd4e58714ca947b1382bf213e22e73315
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of external URIs and the link farm heuristic suggest an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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 https://queure.ru/uplcv?utm_term=farming+simulator+2020+mobile+apk PDF link annotation
    • http://nature-revive.org/files/file/navilisusemuveki.pdfIn PDF document text
    • https://copperscrap.wasteequipment.net/ckfinder/userfiles/files/gegilikofakamuvalokemaxox.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210908135336187.pdfIn PDF document text
    • http://hanstime.com/userData/board/file/21218926748.pdfIn PDF document text
    • https://espiber.cl/images/uploadedimages/file/sufipogadofejizebefivanu.pdfIn PDF document text
    • http://lianbang123.com/uploads/files/202108311905372170.pdfIn PDF document text
    • https://tarsiman.ee/files/file/romugaromowogotezitoseg.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/xemutolajatu.pdfIn PDF document text
    • http://dfwarbitrator.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/29337275397.pdfIn PDF document text
    • http://hamzalegalservices.com/userfiles/file/supipelewolamudoxaxotilup.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/luramog.pdfIn PDF document text
    • http://idealthailand.com/file_media/file_image/file/12965386082.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/kabiz.pdfIn PDF document text
    • https://eownauto.com/uploadpic/files/bupale.pdfIn PDF document text
    • http://tuzy.pl/Upload/file/gakupuzavuk.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/museradupazizilowerejadub.pdfIn PDF document text
    • http://agilesolutions.in/uploads/pokavezanome.pdfIn PDF document text
    • http://www.feniuniversity.edu.bd/app/webroot/ckfinder/userfiles/files/kugibuketapevijixo.pdfIn PDF document text
    • http://maremania.net/img_pagine/file/jemakututapatesetixux.pdfIn PDF document text
    • https://www.vita-organic.eu/admin/ckfinder/userfiles/files/vazanikojogufogapeva.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/kenibofab.pdfIn PDF document text
    • http://xn--b1amishc2fb.xn--p1ai/ckfinder/userfiles/files/13742227854.pdfIn PDF document text
    • https://aldapa.eus/files/galeria/files/26458526723.pdfIn PDF document text
    • http://onlinemidias.com/ckfinder/userfiles/files/72015083034.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/161346c5c59798---dekonijijuwomanipagi.pdfIn PDF document text
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/69771655081.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_off0000b71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB71D 11148 bytes
SHA-256: 4b8abedd9aa6c42c91df6bbbc51d5408c22d951223da6ea67cf5dabc5c0ba5ad
font_01_sfnt_off0000d0f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE904 18308 bytes
SHA-256: 17fb26ef3c061388bbdfd22e7f710002e66acf338f77cdd6e7e95fb53af4aeb5