Malicious PDF — malware analysis report

Static analysis result for SHA-256 defeee75e455625a…

MALICIOUS

PDF

73.1 KB Created: 2021-09-16 04:15:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 45fed4c1c9323efd47d200c20173de23 SHA-1: f9408b5b63588e6e8458f778b6699b69c36c9a8e SHA-256: defeee75e455625a12236334e77dd331bb8955606c63806bed07177f43a9cedf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm with numerous URLs, many pointing to compromised WordPress sites or disposable domains, suggesting an attempt to redirect users to malicious content. The presence of external URIs and link farm heuristics strongly supports a phishing or content-distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9962

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://le27.fr/docs/file/vibodus.pdf In PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f67c189491---54543218387.pdfIn PDF document text
    • http://bwemfjhjk.friend-match.com/upload/files/pilujusu.pdfIn PDF document text
    • http://www.lalorraineperdue.com/documents/55728609293.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/161300bf7b0130---5619482253.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/76518169041.pdfIn PDF document text
    • http://dellalontra.it/userfiles/files/zuseximafit.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613b0dbbb4d7b---logufefetufep.pdfIn PDF document text
    • http://sacmacbook.net/userfiles/file/fedemewus.pdfIn PDF document text
    • https://kocarbon.vn/luutru/files/10211303229.pdfIn PDF document text
    • https://implantologie-deva.ro/app/webroot/files/userfiles/files/vumupixedukamafenul.pdfIn PDF document text
    • http://boletin.alicantehosteleria.com/lib/ckfinder/userfiles/files/18022255208.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141cf294dff0---10405706671.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/pgp0m1rmd0c5b62lftl6io48lr/lifikidupulapazeg.pdfIn PDF document text
    • http://daechienglishpark.com/ckfinder/userfiles/files/89091122107.pdfIn PDF document text
    • http://altadirezione-consulting.it/userfiles/files/3002747657.pdfIn PDF document text
    • http://ansing.nl/userfiles/file/77335676087.pdfIn PDF document text
    • http://qualityspices.in/ckuploads/files/45483704862.pdfIn PDF document text
    • http://twsl.mingann.info/upload/ckfinder_temp/files/20210904171337.pdfIn PDF document text
    • http://eiffelflowersquesnel.com/userfiles/file/xibenow.pdfIn PDF document text
    • https://speakingparrot.com/upload/ckfinder/files/32863147007.pdfIn PDF document text
    • https://vaitinhdien.com/app/webroot/upload/files/72650254323.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=vpn+pro+apk+2020PDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b78f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB78F 10012 bytes
SHA-256: 120b1a53562892aedf9f9e4b732746c2362326d24bb73c0ce34f9b513a5ad48b
font_01_sfnt_off0000cdde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDDE 1948 bytes
SHA-256: b033f7fcbcd390b2cb396fbb5f03ef01f7ca9afc151f9d9df21604321f961cfa
font_02_sfnt_off0000d6dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DD 15468 bytes
SHA-256: 4879e6c48d60428ee15a6a7c2f0f2404eb345238513e6671c41e4d4327d91db7
font_03_sfnt_off0000fe35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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