Malicious PDF — malware analysis report

Static analysis result for SHA-256 7faa543a2c37f88d…

MALICIOUS

PDF

87.3 KB Created: 2021-08-29 22:16:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ee530c4d153f975dcf092e8c88270144 SHA-1: ecc10d6586d47912442c4ba126471fc6b056cb0a SHA-256: 7faa543a2c37f88df0480a1b30c6886920acd5c55c7f25d14a8004611ed3f5d7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the presence of external links and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://pixomot.ru/uplcv?utm_term=pdf+files+for+kindle PDF link annotation
    • https://cambodiadriverservice.com/userfiles/file/20733210226.pdfIn PDF document text
    • https://sofanet.ro/ckfinder/userfiles/files/vomoraduvodupemage.pdfIn PDF document text
    • http://candientuvibra.com/images/file/70019944756.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/6fde99c74fe01f1dc5af18178072a76f/7997864919.pdfIn PDF document text
    • http://predit.ru/admin/ckfinder/userfiles/files/sotak.pdfIn PDF document text
    • http://petersonspann.com/clients/3/32/32c4b2f41fa698b5b938e848169c8dcb/File/legejoro.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/5761033839.pdfIn PDF document text
    • http://markfarolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/32033517647.pdfIn PDF document text
    • http://isgsrl.it/images/file/93474732383.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080b8ce9407b---48525454777.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbdc1f5bc72---rifokanilu.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd0a937456f---mapaluwasavawafapakafuga.pdfIn PDF document text
    • http://ondrejkocar.cz/img/file/sikuxivagitafetinefetemi.pdfIn PDF document text
    • http://bosch-elektronarzedzia.pl/catalog/file/suwavinamenaforaditafular.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/temifoku.pdfIn PDF document text
    • https://securityguardsupply.com/php/uploads/file/samedib.pdfIn PDF document text
    • http://artechq8.com/beta/uploads/files/liworusejixolosabisux.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfaa3d2a6c---jeteriruxademi.pdfIn PDF document text
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/darewubenaxokevewuk.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ec523f45002---temizinovomeronavine.pdfIn PDF document text
    • http://cbcom.eu/ressource/site-image/files/12876244044.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a281b3cfc2d---85119285852.pdfIn PDF document text
    • http://cuanhomkinhtoanthang.com/media/file/48034982788.pdfIn PDF document text
    • http://vlajamo.cz/images/file/1039597594.pdfIn PDF document text
    • http://klhl.com/userfiles/file/kawexoxuzisapozufim.pdfIn PDF document text
    • 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_off0000effc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFC 18216 bytes
SHA-256: 10e46bc6f8e3f189c4b7e532f0438700ce928ac1e2efd862cbb1966e7f1efcb6
font_01_sfnt_off00011f70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F70 10180 bytes
SHA-256: 01bdf279ab725d9b7d026095543a6e6a564f0cb27a4b559b06fa6211732cc048
font_02_sfnt_off0001364d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1364D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.