Malicious PDF — malware analysis report

Static analysis result for SHA-256 cee8a00272aa6138…

MALICIOUS

PDF

82.6 KB Created: 2021-08-20 07:03:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: fa76254e932158bfadd8c703cdc67331 SHA-1: 1d6ce2be7a481629087535457a5bc6499b9a9560 SHA-256: cee8a00272aa613849a78c51b8e340fd3e745914ea7b06b9dc58bd4459fd08f0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, many of which point to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via these external links.

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 http://fernandopelosini.it/userfiles/files/30060347510.pdf In PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/0e6ca925a140ecd3ea526e2ecbe57191/rorusugedaja.pdfIn PDF document text
    • https://repare-ton-smartphone.com/userfiles/file/43253191324.pdfIn PDF document text
    • http://allycatering.com/userfiles/89845391922.pdfIn PDF document text
    • https://otartufo.com/ckfinder/tartufofiles/files/famezesofi.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/161091342b98b6---67017901625.pdfIn PDF document text
    • http://rana-international.com/userfiles/files/rolobatojer.pdfIn PDF document text
    • http://aromaonly1.com/yamituki-n/uploads/files/pizupadad.pdfIn PDF document text
    • https://trouver-une-ssii.com/img/pics/files/vazoxuxa.pdfIn PDF document text
    • http://ahsaipu.com/v15/Upload/file/20215112156406930.pdfIn PDF document text
    • https://alternatifhirdavat.com/upload/ckfinder/files/3564708258.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16094da5c77ef5---37312325128.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b36fd367ac8---87473132116.pdfIn PDF document text
    • http://phongkhamtamthan.net/uploadeditor/files/redinakijuruku.pdfIn PDF document text
    • http://tcurryproperties.com/konadnew/userfiles/file/58842999930.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fab49562e08---zotelametuneloperova.pdfIn PDF document text
    • http://elosc.com/upFile/file///ITX202107310901281245.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/669552a4f78f255dad73d39e32b89351/julozesa.pdfIn PDF document text
    • http://womenscouncildallasarboretum.org/clients/85748/File/85910432374.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608131500b067---gasukumezinizonerovano.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1608ccf6e43ece---powagebedosokemupisarewul.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/bukopukalijikeboxuzir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=mega+man+zero+collection+ds+romsmaniaPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC42 18324 bytes
SHA-256: fd1dec6a2b3639ccfd1bdff206630401e53a43415d8908aaefa165f1e707e776
font_01_sfnt_off00010b47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B47 10764 bytes
SHA-256: 5c0e379de61167e46b03ac91811753c371b35b23c8bd6fc25b03e2cb884cdd80
font_02_sfnt_off000123d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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