Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f7322130032d2c9…

MALICIOUS

PDF

85.1 KB Created: 2021-09-20 21:16:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f970cd3a9c1008608648629109a6adfc SHA-1: b4b8ea6ea5bb9027228f2c0eca18fb3436c5eda5 SHA-256: 2f7322130032d2c96d7f2b5338d5c537dbe5d683651cbcbd2c74ce0b8e71146d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by multiple heuristics, including ML classification and ClamAV detection. It contains numerous external URIs pointing to disposable hosting, suggesting a link farm or phishing lure. The presence of a 'download button' heuristic further supports the deceptive nature of the document, aiming to trick users into downloading further malware. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://drafthe.ru/uplcv?utm_term=download+apk+lightroom+premium+android PDF link annotation
    • http://wskinbody.com/data/boardData/files/fikavoramofuvobebowavux.pdfIn PDF document text
    • http://robotsuk.com/luckingbros.co.uk/userfiles/files/favipekasamejinuv.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/97078723780.pdfIn PDF document text
    • http://conganbacgiang.vn/app/webroot/uploads/files/galijudajofalufor.pdfIn PDF document text
    • http://portaldo.eu/contenuti/upload/file/44949991245.pdfIn PDF document text
    • http://hatdesechia.com/storage/ckfinder/files/potipexeze.pdfIn PDF document text
    • https://ferdavagnar.is/images/fck/file/83706775726.pdfIn PDF document text
    • https://investincarpathians.eu/app/webroot/media/files/dupoxelo.pdfIn PDF document text
    • http://candientushinko.com/images/file/kawozuvaf.pdfIn PDF document text
    • http://p-itos.net/admin/userfile/image/file/87365813127.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/158749148061381713aae85.pdfIn PDF document text
    • https://typeone.com.my/ckfinder/userfiles/files/ranevovejinavowuxufe.pdfIn PDF document text
    • https://esz.jp/img/editor/files/zegivojonigepib.pdfIn PDF document text
    • http://burchiellati.com/file_fck/file/27604466572.pdfIn PDF document text
    • https://funke.be/data/file/salupezo.pdfIn PDF document text
    • https://giaynangchieucao.com/userfiles/file/89767255410.pdfIn PDF document text
    • http://alteredcompta.com/buddha/ckfinder/userfiles/files/fiziminutotu.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/031bf38c32425f962138a9759f34edc3/fajadugi.pdfIn PDF document text
    • http://thewhitmerlawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/67478192429.pdfIn PDF document text
    • http://happyhanool.com/ckupload/files/kuzedajebe.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/67950118245.pdfIn PDF document text
    • http://jonme.net/ckupload/files/genofozibirixepavulemutux.pdfIn PDF document text
    • http://stamforgtechnologies.com/uploads/potomodul.pdfIn PDF document text
    • http://ddaengshop.com/ckupload/files/83586165428.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613875b0be4da---vubavikatutejubevuruferup.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_off0000e7bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ffd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD3 10948 bytes
SHA-256: af3eccd34d210177b01a48ccd66ee3e14187708fd0b6643d01411920ecb72802
font_02_sfnt_off000118cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118CB 17516 bytes
SHA-256: f462358569d461500b5f35dc1e43f4a90112bc7d9d9981927f1f17595bcd2883