Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e0599575df3391a…

MALICIOUS

PDF

87.0 KB Created: 2021-07-19 22:05:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b6720a65e7d13bd19f69cfec570d8cdb SHA-1: 6dcb5ad2adb3cd6defe710e25b4fa3a1f7f8b883 SHA-256: 8e0599575df3391a7bde2cb34a14f98197252d9d794fd21c60d52a86e7f4ddf4
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple PDF link farm heuristics reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://akcihlar.cz/userfiles/file/kupoxunuzuwuwuvebawefirom.pdf
    • http://stasta.com/userfiles/file/fuwimigilabol.pdf
    • http://szao-spb.ru/images/news/file/25832866943.pdf
    • https://abugfreemind.com/userfiles/file/28226017659.pdf
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/e62c9964ae20db5129dcad63117b722b/pexaxogedaketefakemo.pdf
    • http://farashimirooz.com/files/lajixedodarajaz.pdf
    • http://irollee.com/userfiles/file/jajejeb.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c96c537878e---sobasopuval.pdf
    • https://cecprint.com/images/file/76632319581.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b98a5c18f7c---fezisisum.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/035adaf7de0858744ed1a63751297dbd/67681108751.pdf
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc1e2a4f71---47382704911.pdf
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160808bc6d0566---41983086865.pdf
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/4cravuj7lksnlg1mlkqbecdlkp/94012204297.pdf
    • http://nhadatv.com/webroot/img/files/32513112809.pdf
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/erjok69irret9h0hi37qg4m3a4/fepojo.pdf
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0752f37bf---bedewaxemegeder.pdf
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/td161ta7l63ne74c0rhoofd776/22631285743.pdf
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/565536508da07f1d9dea178cb2293869/bosavis.pdf
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/3ad50d85ccede72877a7a8f9bdaef26e/8655402931.pdf
    • http://alptw.com/images/files/34185743407.pdf
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/57698964994.pdf
    • http://adabaskimerkezi.com/upload/file/gawikefozufuniku.pdf
    • https://dovolena-jiznicechy.cz/uploads/67475625660.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a661055f057---4239079695.pdf
    • http://szkolaprywatnaleszno.pl/userfiles/file/98709705540.pdf
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/083e1q75ib046hgnqgcd0t2517/defapivexotenojijegazexej.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=divorce+and+spousal+support
    • 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_off0000f079.bin
c09472f79c7c9939d55eb6339e55d6f5b6c91d570a39fa4862fc41cd91eadd7b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF079 10672 bytes
font_01_sfnt_off00010909.bin
d0e92d6e15108e667025596fdb74629340fa4043409f93940a844ea2b8a1581f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10909 17404 bytes
font_02_sfnt_off000136af.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x136AF 16792 bytes