Malicious PDF — malware analysis report

Static analysis result for SHA-256 29da066d8d0a725f…

MALICIOUS

PDF

77.0 KB Created: 2021-09-13 10:10:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 7838b48062dbd65805de387a5b352a1d SHA-1: ba7ada36102ee2e72c7305478606dd01379600d3 SHA-256: 29da066d8d0a725f45433fe6d0facd4d9bd885c9fc7969104fef415a7f40e981
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or malware distribution lure. It contains a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. Embedded JavaScript was also detected, which could be used to further obfuscate the malicious intent or initiate a download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://tutek.eu/userfiles/file/roliwako.pdf In PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/gqlvh0uuv446gs4esd59oilce7/70971424191.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161338acc32603---xutasuwa.pdfIn PDF document text
    • http://metamorfozyayincilik.com/userfiles/file/nesafisapiwinenodititeriz.pdfIn PDF document text
    • https://parc-hotel.info/file/99122981389.pdfIn PDF document text
    • http://urgentcarepb.net/userfiles/file/86167627669.pdfIn PDF document text
    • http://nbmounts.com/userfiles/file/1631495062.pdfIn PDF document text
    • http://sdtrafficticketlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dufig.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131682ba61d9---69158316795.pdfIn PDF document text
    • https://otterdisplay.com/userfiles/file/sanosetetebis.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132265dab1dc---dixabovunujupedarofeluviz.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e6d5b143c4---21348619852.pdfIn PDF document text
    • http://oresteruggiero.com/userfiles/files/fobavu.pdfIn PDF document text
    • https://www.notusweb.com.br/ckeditor/ckfinder/userfiles/files/moxisawurox.pdfIn PDF document text
    • http://immobilieninvestors.eu/userfiles/file/tuzikatadi.pdfIn PDF document text
    • http://naso10.com/userData/board/file/pafarolalujeke.pdfIn PDF document text
    • http://caycanhtuyhien.com/uploads/image/files/ximer.pdfIn PDF document text
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/remugitaz.pdfIn PDF document text
    • http://fabriquetextil.com/js/new/fckeditor/userfiles/file/74596599837.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=stream+floyd+vs+loganPDF 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_off0000c71f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC71F 18144 bytes
SHA-256: 41f6c0fc2dbad8b9464bda51e426d2fbbc0d38cfc19473e910cee18f95594d1a
font_01_sfnt_off0000f652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF652 10860 bytes
SHA-256: a2b5763a1dbe73f8255218a577f4e59bce66840ec1058d381b24e5fde60da0c2
font_02_sfnt_off00010f42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F42 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1