Malicious PDF — malware analysis report

Static analysis result for SHA-256 d899b0ce3b0b629b…

MALICIOUS

PDF

81.7 KB Created: 2021-09-15 23:45:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1315b9771ac859a001a468126b0dc27b SHA-1: 4ada4348a328fd8020f5878924f69931f741ff42 SHA-256: d899b0ce3b0b629b98c7c023dd13e9c2d6bfe5fcd8c948e3a575ab2097c9c99b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of creating numerous links on distinct hosts, suggesting an attempt to manipulate search engine results or distribute malicious content. The embedded JavaScript likely facilitates the redirection to these malicious sites, potentially for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://barrybusiness-crm.com/ressource/devis-photo/files/36119172202.pdf In PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f5ad811472---sizimetadudukudojusakanop.pdfIn PDF document text
    • http://globalfeedindustry.com/upload/files/xodamakoguxumofiwafixuk.pdfIn PDF document text
    • https://www.scmsgroup.org/ckfinder/userfiles/files/74540082211.pdfIn PDF document text
    • http://koszyczarek.pl/userfiles/file/85233280909.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131a7c6b032e---83415855071.pdfIn PDF document text
    • https://oriental-kitchens.com/userfiles/files/24426677480.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/a9b4bffcb7f7d82e216a09ce886a16ef/rikeferosujifoko.pdfIn PDF document text
    • http://stensoproject.com/userfiles/files/pimabuputedinenide.pdfIn PDF document text
    • http://hylimusic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/30197143598.pdfIn PDF document text
    • https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/nireja.pdfIn PDF document text
    • http://7seapharmtech.com/Uploadfiles/files/84591492028.pdfIn PDF document text
    • http://reklama-kemerovo.ru/files/files/lovofuzoruru.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/l236muqcphjoicca459st1ual6/duxonova.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/91085709555.pdfIn PDF document text
    • https://knoxvilleremembers.com/media/43922246531.pdfIn PDF document text
    • http://gold-carsales.com/js/upload/files/kufat.pdfIn PDF document text
    • http://ayurvedicclinic.org/userfiles/file/kumorelixetaz.pdfIn PDF document text
    • https://angel-juicer.com/FileData/ckfinder/files/20210913_C58FC9E33549789C.pdfIn PDF document text
    • http://ilonew.tasksplan.com/ckfinder/userfiles/files/9445497270.pdfIn PDF document text
    • http://stroytehcentr.ru/images/file/91636514484.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1ef28fb97---73691785921.pdfIn PDF document text
    • https://quangcaowebsite.xemlaco.com/uploads/files/pisufuvisekozi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=talisman+online+mobile+mod+apkPDF 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_off0000d2d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE4 21232 bytes
SHA-256: f1da50af20c618df5a469b3ffcaf816d9f2322a2a6613b18df839e568dec83ae
font_02_sfnt_off00012211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12211 10548 bytes
SHA-256: 12907308b3e78520a31e8ecc155276a6b7be510d52ffa45c82fb8d4bce1893f2