Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e691952684f6669…

MALICIOUS

PDF

84.2 KB Created: 2021-06-29 20:05:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4d1dcda4deb5fe62705af31dd6249f32 SHA-1: 29c7ef12be394f5cc2e771621e95745f8dbf4711 SHA-256: 9e691952684f666962138b472ff0929486c00553b58a1cf9e67a617cfcba63fd
156 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The primary function appears to be redirecting users through a link farm to potentially malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/c5a312fe1e0edb3b47599e4d6bef70a5/dulazetikarukiluzijoguko.pdf
    • http://allg-gyn.ch/userfiles/file/78590052564.pdf
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/jvrc3frih8en6lo3j0p2lslcoa/libozewuxozetowa.pdf
    • http://dekoblickfang.de/userfiles/file/bomoxivedetukeb.pdf
    • http://nacyc.jp/Upload/file/85215841273.pdf
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/c30f118ae30a6a1884845cc9a3387e50/lunijesefijoxotud.pdf
    • http://brcassociati.com/userfiles/files/xogexuwizasilunofevo.pdf
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/2b1f9eda45588237a50061edbcaca305/wokubarolujitodukomekug.pdf
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/8f95248fc2c7ff527b0e4f4dc32e5866/sipejati.pdf
    • https://mytalk7.com/_UploadFile/Images/file/32299587344.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16094a046cbd5c---44694100440.pdf
    • http://deficanderel.com/clients/6/67/674a09facce11b7629d390eef9534ff9/File/909206146.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160901fc9d78ea---robuka.pdf
    • https://bestcoloringpages.com/userfiles/file/84413552587.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e9a1b600b0---niguve.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/btsrmrhuk25dcjacgli8tes0en/lamufipivute.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=alias+what+does+it+mean
    • 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_off0000e696.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE696 16792 bytes
font_01_sfnt_off0000fea8.bin
e073d4b994f8bfad6a75aca4e389a5589e23e92ae8310865afad6d4bb8fa9102		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA8 17220 bytes
font_02_sfnt_off00012b47.bin
9af8a2756b0ddb9490ad2d07db8c4ebd0d9a13077b55c09bc2ce7dc5b4034963		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B47 10480 bytes

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