Malicious PDF — malware analysis report

Static analysis result for SHA-256 badbeb6f468f29ee…

MALICIOUS

PDF

81.9 KB Created: 2021-09-09 05:17:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 35643e9f484f2c66a297edf599d736cf SHA-1: b9e0c57d9d806cd1c2c8cc3edf53f7c811ff6562 SHA-256: badbeb6f468f29ee403b4d532daf11b653e98497f5198a817cd0313118f0b36d
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 structured as link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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=foot+live+tv+apk PDF link annotation
    • https://eltechma.com/zdjecia/fck/file/woxoseverabuteji.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/reperifigedemilapida.pdfIn PDF document text
    • http://agavietnam.com/img/files/runuvitupomibu.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/pekexekifus.pdfIn PDF document text
    • http://brilsports.ro/userfiles/file///95079000673.pdfIn PDF document text
    • http://potlista.com/file/files/67849399969.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/sabevanodukoliganoju.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613966cbc83b6---batipigawakig.pdfIn PDF document text
    • https://activsport.ro/userfiles/file/zogatutipedozixagebagavot.pdfIn PDF document text
    • http://reversetheclocknow.com/ckfinder/userfiles/files/29588712070.pdfIn PDF document text
    • https://wanfutemple.urwaydesign.com/data/file/userfiles/files/47098307442.pdfIn PDF document text
    • http://sumisaedu.com/FileData/ckfinder/files/20210907_6D0618F2E52F7767.pdfIn PDF document text
    • http://criminisiepartners.it/userfiles/files/83462657016.pdfIn PDF document text
    • http://millionsdiscount.com/mo_images/files/zesobepezafat.pdfIn PDF document text
    • https://landtop.com/filespath/files/20210904085144.pdfIn PDF document text
    • http://enricobarraco.com/files/wovaw.pdfIn PDF document text
    • http://artiguardia.pl/userfiles/file/38911845680.pdfIn PDF document text
    • http://ilyxrace.com/userfiles/files/42052863386.pdfIn PDF document text
    • http://highgaincomposites.com/img/file/2021936483.pdfIn PDF document text
    • http://ilovechardonnayhills.com/userimages/88001175319.pdfIn PDF document text
    • http://sure2trips.com/bot/ckfinder/uf/files/wapitekosuvujiranizi.pdfIn PDF document text
    • http://penzionnakrizankach.cz/ckfinder/userfiles/files/78999288528.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/14038328680.pdfIn PDF document text
    • http://behtarinekhodetbash.com/files/files/sudikimomilifutumujo.pdfIn PDF document text
    • http://wangguanhardware.com/userfiles/file/rokekumemonevorasusipu.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/867aa65c2a6262ef1cd1eb59e27d10d6/29958952515.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_off0000ddc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC5 10008 bytes
SHA-256: fd066b8b7d6af53a3a1d9bbe46f03957c68f4a3accb1b9390caa149c8f3eb52b
font_01_sfnt_off0000f419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF419 17704 bytes
SHA-256: ba83b440d84d836a1f3cf755fe80076c55d7619f4a235231cbb28559a30052a2
font_02_sfnt_off00012200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12200 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1