Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2314c43c0cca8f8…

MALICIOUS

PDF

78.2 KB Created: 2021-08-23 10:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 41beba60f7fe402802fcfafb6c7718e2 SHA-1: 9645e811d3ce6b2f80ee63928e4fd545380a15f6 SHA-256: e2314c43c0cca8f8911117b39fc4d3767cf216547d0fb64cfe238ce85d1e7e2b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 phishing or malware distribution. No scripts were extracted, but the PDF structure itself is used to host these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cepsagibyachtfuels.com/images/photos/66189505204.pdf
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/63d98bcef42f32673c3747864bd8c09e/lokolevazojewuxusogisub.pdf
    • http://hakkabrothers.com/userfiles/file///81071687935.pdf
    • http://sakaryakasaplarodasi.org/userfiles/file/44119704184.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f36c034dd---fuvaxamisoneje.pdf
    • https://twinslock.com/locktactyuma/userfiles/file/89944689126.pdf
    • https://xosobacninh.vn/webroot/img/files/87115380758.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/ef67f231ab5aaaa4267096fa538a10cd/5238760986.pdf
    • https://marblo.ph/app/webroot/img/files/fobunebegak.pdf
    • http://abacusnancy.com/userfiles/file/39925674263.pdf
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/70e3dc649090e34cf6ff5c30543cf671/fenepi.pdf
    • https://sp-pir.ru/wp-content/plugins/super-forms/uploads/php/files/6b98b62ca0902dcc24ad2d1f420d492a/85817869292.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d33a5cbe2191905f46ce411e806be030/xigapiru.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f51e02e0ae9---85363804657.pdf
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160a48e4c3a5f6---rudosesavaxonone.pdf
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/da85ojulrhss560dpociam3mer/86104696282.pdf
    • https://totalmediasolutions.ae/ckfinder/userfiles/files/wewevesebudefirezomu.pdf
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/d34004bb99d0057126c54d18e25dfdeb/divuludud.pdf
    • http://willettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fivuzotifaranak.pdf
    • http://tyextractor.com/d/files/banisuvega.pdf
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/1fgb952ieqafhptv694e16f30m/60238381707.pdf
    • http://24horasnoar.com.br/ckfinder/userfiles/files/74431387038.pdf
    • https://thietkeweblongan.com/upload/files/pewuko.pdf
    • http://nextlab-semi.com/files/fckeditor/file/kuzodefiwotosum.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=jose+mexican+grill
    • 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_off0000cf8f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF8F 16792 bytes
font_01_sfnt_off0000e7a6.bin
c0391d38b878b45e3ba1053a2748ce0b5335de99c4494e5f5430d1b06a5f0f77
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A6 10568 bytes
font_02_sfnt_off0000ffc0.bin
6ffe350a7b40dff2b5c934ac93f917629132cde030d3e850493b5e11aa991136
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC0 16820 bytes