Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eeb33603a2ff9e4…

MALICIOUS

PDF

91.2 KB Created: 2021-06-29 11:42:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c4ad35ce3ca85f41427cdeaaa284fae4 SHA-1: f2a97d81549b75b59bbdd076ced43c9911d7bedf SHA-256: 0eeb33603a2ff9e46b58d025e292aa1bef36588b86d492a2c6bd7d83836c21f1
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with numerous URLs pointing to compromised CMS upload directories and disposable hosting. The embedded URLs and link farm structure suggest the document's purpose is to redirect users to external malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baba638464e---45965807184.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/36c1c21f2869084dc187764a08c9cdb2/91253173698.pdf
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/vmo1j51jvp7h4euejpahe2ipm4/nixonuj.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/6769883209e6e456a241b6d6f8b8225f/wavulomafejirosix.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160d07b185e9ec---xefibagabixepi.pdf
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a44a702f61f---limobafafot.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090fed8c2250---boferul.pdf
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/gkh1qa84iihu9k3fkvm0uktf87/66117178584.pdf
    • http://carszana.com/image/upload/File/sagikokoz.pdf
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b3a03f55c---77671040604.pdf
    • http://szyldkj.com/luodan/images/userfiles/file/49263593937.pdf
    • http://kap-group.com/ckfinder/userfiles/files/vegizadizowuliri.pdf
    • https://tractorpulling-emmeloord.nl/upload/file/49003287123.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/9965296082c284187302c16e62780707/12381338562.pdf
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609d6a48c0ab6---tikotezizemikosumiso.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d5cd42c4a5---3832234969.pdf
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/npgrfoanl62l25j288gn7d38kl/linijezoxesoxijiv.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b88e3db1ca6---minunugalodenex.pdf
    • https://shriayurvednagpur.org/public/ckfinder/userfiles/files/guralivakikipokufulu.pdf
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/8c20cpodtsgeauco6svseptost/32261286494.pdf
    • http://cloverdiamond.com/file/12643500544.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/jevu8m6b8c11lortsl1sauvc4o/tujisaget.pdf
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083e937a37eb---fanifuxejabagobemogapezun.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=best+wishes+for+future+job
    • 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_off0001000c.bin
8e373a8c805ecc3dc37dfe29e40da63491081c659186bd89d4226b3af61a2e75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1000C 10508 bytes
font_01_sfnt_off0001182b.bin
ee593faecfffb7d7496c1eac1d833f5ac680982601413de94f54706e4867c775		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1182B 18080 bytes
font_02_sfnt_off00014793.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14793 16792 bytes

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