Malicious PDF — malware analysis report

Static analysis result for SHA-256 125e5d3c91dcf65a…

MALICIOUS

PDF

68.8 KB Created: 2021-09-01 21:42:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3570c5edc0da04857b6b16561fcc0aca SHA-1: 19855527a367587a64ef454db0ff7daac51d12cd SHA-256: 125e5d3c91dcf65a07997b54f3d13c94a97043a65c7ff13ad7be5eae6a7484ee
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains embedded JavaScript and presents itself as an image-only document with an action trigger, typical of a screenshot lure designed to prompt user interaction. The document also hosts a link farm pointing to compromised CMS uploads and disposable domains, suggesting an attempt to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://netmutum.com/userfiles/file/pasavotejinelaw.pdf In PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b1d3c71716d---93290164961.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1c2370dc9a---80915055699.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608e27db189ab---94127325202.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/noxaluk.pdfIn PDF document text
    • http://www.ishvani.com/www/js/ckfinder/userfiles/files/96348034212.pdfIn PDF document text
    • https://jordan.si/dokumenti/file/44490378335.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/koboperalulodujopexapesow.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/16087b653f221b---siruvupinomozi.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b96ca95e8f4---gusivolo.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/dusikewot.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a366e6bc241---94708942755.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612a143e5047b---52816443756.pdfIn PDF document text
    • http://ibookingkr.com/FileData/ckfinder/files/20210719_2D690A935F9F5B9D.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/6429e1c9b24e8ac4bf6349a3a4a3625d/rokogega.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/6fa83ae496ad4e99e4f0bd94af803c7d/wetabete.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/pemipedenubemokeme.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/dikogudixexe.pdfIn PDF document text
    • http://volamtuyetthe.com/userfiles/file/fekapusubobo.pdfIn PDF document text
    • http://clingac.es/d/files/fadosafi.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/37671539480.pdfIn PDF document text
    • https://askisan.com/upload/ckfinder/files/15469500911.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160788f151da70---zefinipile.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=quiz+for+sistersPDF 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_off0000b3b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3B6 10116 bytes
SHA-256: 47946a9d20edb30d5e0089c07c7a514535109ec6af68b37a7403e53d290d2c14
font_01_sfnt_off0000ca98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e2aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AA 14144 bytes
SHA-256: f10cd43aec10e4df838d4d4e76a9de6c7b8188c43733f6993f0ca70a04120678

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