Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6dafb0f25336ac6…

MALICIOUS

PDF

84.0 KB Created: 2021-08-04 21:06:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5ea1b2d924f23609c9fd5987226d429a SHA-1: c84dac6dee2d963ac097c236f6c09631171fc391 SHA-256: f6dafb0f25336ac60ade595650f4c2712865a85eb7e023bc1438f16658de36be
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links pointing to compromised websites and disposable hosting, suggesting it is part of a link farm designed to distribute further malicious content. The presence of these links indicates an attempt to redirect users to potentially harmful PDF files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://euredit-editions.com/userfiles/file/tazekoxapatufurogekag.pdf In PDF document text
    • http://drironcat.com/images/file/nolukipoju.pdfIn PDF document text
    • http://ok-poland.com/userfiles/file/83735165721.pdfIn PDF document text
    • https://agermag.ro/mm/file/kifojoj.pdfIn PDF document text
    • https://bangprice.combangprice.com/beta/cms_image/file/93484672793.pdfIn PDF document text
    • https://mangmalungtea.com/userfiles/file/figixagakizowapux.pdfIn PDF document text
    • https://wietsevoermans.nl/ckfinder/userfiles/files/43104021499.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/38444869825.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084b06fa18cf---93561631408.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/89a741cb0dc740df52190ba745c886e8/60549781416.pdfIn PDF document text
    • https://cengilli.com/icerik_images/file/49119561409.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/35918128428.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160841bad10af2---nagapiboxasede.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160857e27bbe4b---melapaludixijuzog.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160941dd0ad686---narere.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c30f161b0---boleravesixusoxazufeke.pdfIn PDF document text
    • http://bouncebodysupplements.com/newerac2c/userfiles/file/muviv.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d934ce1aa9---2861805817.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6e7a36cb4---39606231110.pdfIn PDF document text
    • http://ebonit.light.bg/includes/libs/ckfinder/userfiles/files/famezum.pdfIn PDF document text
    • http://conomiya.com/images/uploadedimages/file/2459376542.pdfIn PDF document text
    • http://hjtech.org/admin/upfile/file/rasalasan.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/de548c5d8f0c8fdf0c361d847bb3f277/zoxugilodarafelik.pdfIn PDF document text
    • http://aodaiminhhanh.com/app/webroot/uploads/files/50898504560.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/c6593119a68e6bcbe1d10d41f08ebcad/puzulifewolumonade.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=bsc+1st+year+chemistry+notes+pdf+in+hindiPDF 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_off0000e1a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BB 17212 bytes
SHA-256: ac5859d9c986c071d8a8e533e6881871040b1e11aef46d4a8bf91b1daa06068b
font_02_sfnt_off00012670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12670 11056 bytes
SHA-256: 5fbd68b95cb10caa35639c9ecdd09e624a3a9dfd9471d90159ee3cc8e0b11cb0