Malicious PDF — malware analysis report

Static analysis result for SHA-256 e02d3f31e26453f8…

MALICIOUS

PDF

87.0 KB Created: 2021-06-26 17:13:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 849df8d00e9542e6fc72df2139e63935 SHA-1: 65e805ade558295319c53219fc31346e0c4dec94 SHA-256: e02d3f31e26453f87a02f0c7408b6c52f170e460d1ee54a0ccce7fa44502d4c5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML and ClamAV as malicious, with heuristics indicating it functions as a link farm hosted on compromised WordPress sites. The embedded URLs, such as http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ecf56a0eb---galukakarotinapon.pdf, are likely used to redirect users to phishing or malware distribution sites. No scripts were extracted, but the structure suggests a lure document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/dbff12f7e4a44f7d1a1a7cd798f02fc9/22808362065.pdf
    • http://blpest.com/UserFiles/file/41957821953.pdf
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/ej0knpp8comnemjr65qr9pgko2/42064054335.pdf
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/0o902sbscbkhsn9k97a142r2h4/fazuwesekelumeze.pdf
    • http://hondaototanan.com/upload/files/bazulufisan.pdf
    • http://stellamaris.cz/userfiles/devatasazubixuzug.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16094539fb9046---fegetuwuk.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077fcf75313f---rufil.pdf
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3d2339c60---gisow.pdf
    • http://biometria.pl/photos_fck/file/27304469392.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af2169e4284---sumikanujupozu.pdf
    • http://yuanjen.com/ckfinder/userfiles/files/10168464884.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ecf56a0eb---galukakarotinapon.pdf
    • https://samarpanbharat.org/trila/userfiles/file/liramofulorojogewigu.pdf
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/40808783763.pdf
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad305ef749---dedebenufutazaduw.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607812465e968---betonolodito.pdf
    • http://cdkkck.com/uploadfile/file/20210527035525.pdf
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b32dbb4cee---75645856183.pdf
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16073672d09bcc---powaxupodi.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/76a037b0q7pf2de2qcvdqfudra/bewagaxubewubiwot.pdf
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/33094398588.pdf
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944bb3f06c2---56568915285.pdf
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/7458c9658cff0f8a13f3c8727e938d4b/13855040661.pdf
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/2099bfc0c7d309c04c0fb85529109f71/82180624854.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=elements+of+drama+and+its+definition
    • 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_off0000f1d2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D2 16792 bytes
font_01_sfnt_off000109e9.bin
399341b4f7402ec3c3c2b920b48c2a6d97840c9eb52212adbaba1820b0d55381
pdf-font-stream PDF embedded font (sfnt) at offset 0x109E9 10496 bytes
font_02_sfnt_off000121b4.bin
a39370478992909142049a587138264029441d24d270d3899cef1130194ac406
pdf-font-stream PDF embedded font (sfnt) at offset 0x121B4 17164 bytes