Malicious PDF — malware analysis report

Static analysis result for SHA-256 dac87d6cb3de7300…

MALICIOUS

PDF

80.0 KB Created: 2021-09-12 06:48:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d02d37f583fdae7d68a8118bd19d56c7 SHA-1: c929c9cc66c2b0774f0fe14bed36b376362d143d SHA-256: dac87d6cb3de730089e6375ce85f1ab4af3aae9001ede95d395bcb80b3b3aa3d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, indicating an attempt to execute code within the document. It also features numerous external URIs, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://sisparts.pl/zdjecia/fck/file/74192630497.pdf
    • http://mygiftltd.com/userfiles/file/31449573650.pdf
    • http://trustarshida.co/cache/fck_files/file/gotivax.pdf
    • http://coreaad.com/DreamDataUpload/file/nowepaduweguxumubum.pdf
    • http://majedalkarkhi.com/pics/file/nedizidaketikitaja.pdf
    • https://birudongker.com/contents/files/95099312515.pdf
    • http://alotercuman.com/ckfinder/userfiles/files/10282074034.pdf
    • http://tonioloclaudio.it/userfiles/files/vijeg.pdf
    • http://teen.plovdivweek.com/js/ckfinder/userfiles/files/68198715155.pdf
    • http://www.tobywells.org/media/fckdir/file/vowubodesalewipite.pdf
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/3750a76424f8c2bc6be8280f03fd7178/finovusabekilowopujubava.pdf
    • http://anhuishangbiao.com/upload_fck/file/2021-9-3/20210903032837859175.pdf
    • https://vmgeducationtrust.org/home/vmgedu/public_html/public/userfiles/file/wefoxiseto.pdf
    • http://www.rafaellucenaehijos.com/ckfinder/userfiles/files/26186227688.pdf
    • https://tatvan.in/userfiles/file/51991639191.pdf
    • https://www.ebenisterie-burette.com/ckfinder/userfiles/files/84807207173.pdf
    • http://simonkuehner.de/gfx/userfiles/files/94646906421.pdf
    • http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/xobefudofedabogenasufonin.pdf
    • http://thrifthelp.com/flash/thrifthelp.com/file/75959571533.pdf
    • https://dalnoboy.com/data/filestorage/upload/files/vimogemojugudonef.pdf
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/161376eed075f9---85278355378.pdf
    • http://bilcafe.it/userfiles/file/82521265386.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=ryan+garcia+free+stream
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3d1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D1 16792 bytes
font_01_sfnt_off0000ebe8.bin
13ea00e8b4e4389abfec872d09df166efbd9ebc3586a0248dddc5e4b292e4449		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE8 10672 bytes
font_02_sfnt_off0001046b.bin
1d9030f85badac0c345371c641da7aa185d049ad524e2b1ee13ac9bf7b154c9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1046B 17972 bytes

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