Malicious PDF — malware analysis report

Static analysis result for SHA-256 6034d3e30129946f…

MALICIOUS

PDF

88.9 KB Created: 2021-07-02 18:20:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 32da286af5d0f71c0e1e2168f930dffb SHA-1: 03503f3b63aa9b0d478426b86028703befe23acf SHA-256: 6034d3e30129946f3e549304567ed432f6c08644f862595072dc5b87ec4027f7
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. Heuristics indicate the document functions as a link farm, directing users to multiple compromised or disposable hosting sites. The embedded URLs and the document's structure suggest an attempt to distribute malware or conduct phishing attacks.

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 https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/3db1f6576b8a3fd7fe733736e71ca8c7/bofutivotutuxozuwo.pdf
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160af9232b4875---begalifes.pdf
    • http://goraku-sangyo.com/userfiles/file/31763962336.pdf
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a37edfc99c1---91806677213.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/dcb7e2e1e6602c3f635e11b57f4bbc63/gojofatuvarogu.pdf
    • https://kueapem.com/contents//files/39659064678.pdf
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c96f3934c15---64136093944.pdf
    • http://geoass.eu/userfiles/files/gajoga.pdf
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/10b77e361b60e7feeea5238f42c586cf/89702939270.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606ffae16a951---rapililukumubusadases.pdf
    • https://www.cittadelmiele.it/wp-content/plugins/super-forms/uploads/php/files/ffbbbf480aea52189864c68b9bb5604e/89785947069.pdf
    • http://edgecs.net/documents/piwubojalunu.pdf
    • http://kingsfinancialconsulting.com/userfiles/file/15600111699.pdf
    • https://ijpdua.com/contents//files/xewodajikipemo.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e7a32645c---89369059482.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/u9di5s1o576jmi0geu7da5r262/kesol.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160968bf926bc0---kusarajerusofudo.pdf
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c72b40424d---gupodatewikulakagigim.pdf
    • https://roweryelectra.pl/app/webroot/uploads/file/16243761104178.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa1662163af---20166841465.pdf
    • http://capitolmetrophysicaltherapy.com/userfiles/file/lunibuvenupimum.pdf
    • http://ozari-ua.com/files/file/zidexulibijikaxa.pdf
    • https://medtek.vn/storage/file/xaguzufajikiwolizekutero.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160779580901b8---17269378037.pdf
    • http://growlink.biz/userfiles/file/funefesovarevelabufedonap.pdf
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/9j3dude3r3b08oveo8s4r2q846/90761848187.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=class+6+science+solution+cbse
    • 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_off0000f9ae.bin
06037716485d633e3e3014cfef002eb24c27066e69be33ba50a007404a2ed45f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AE 17032 bytes
font_01_sfnt_off00012629.bin
f00ee2e3a25ebc43853744ee8756eef1cef3ba43fe6406a3d749bdcebde7ae60
pdf-font-stream PDF embedded font (sfnt) at offset 0x12629 10560 bytes
font_02_sfnt_off00013e63.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13E63 16792 bytes