Malicious PDF — malware analysis report

Static analysis result for SHA-256 f96c9f54620ea425…

MALICIOUS

PDF

95.8 KB Created: 2021-06-30 10:18:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ab8caab97c3eab33195ca757ed768820 SHA-1: baf4b57913390542f30feb5e5811e85a2c841f12 SHA-256: f96c9f54620ea425c180575ca683e582964aae533be15da91e3149cbda17c81f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the nature of the link farm and the presence of external URIs suggest potential for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://crysiq.ru/uplcv?utm_term=motivational+thoughts+sad
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/80005742509.pdf
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf063e5d8d3---maxeju.pdf
    • https://skatrip.com/basefile/skatripcom/files/dadegofelifovosunojevoju.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1608ace158e5fd---6892419653.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081006e08b09---33314061293.pdf
    • http://asesorgubernamental.com/images/file/bogigokisexovuzudozorapet.pdf
    • http://lncxjzxxw.com/upload_fck/file/2021-6-30/20210630075342793964.pdf
    • http://kapelski.pl/userfiles/file/xobemokifefijimusog.pdf
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/991onrsl3m8fqsk8m6n9uq7lnv/toxakamorajuvevapulupem.pdf
    • http://global-insurance-broker.de/downloads/12967622659.pdf
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/kftovfgi8d83asciuivvelvstr/ledidekebabulezizagoj.pdf
    • http://accessiblevehicleservices.com/userfiles/file/zabokewogat.pdf
    • http://paillasse.hu/userfiles/file/558285878.pdf
    • http://buddhavehicle.com/userfiles/file/46541425320.pdf
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/97bb1639154fad196550f5b5ab01aa7c/talurodezok.pdf
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4546b6406---kalopawaponad.pdf
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/2c3ff3598143ff30122160fc89f42527/nevogexuzuw.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/vm6veifnm8oo74udqtnpo6ap5u/wekaxadezipu.pdf
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/84d8ffc205f655d0fc2dec2374df2f1d/1800032262.pdf
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/5e8bc3e79fab01b2fd261ecbb29a66e7/47332225019.pdf
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/3847af37cb4649ad010bcd95f0d869d1/molilatuvidexofedalit.pdf
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071cc7c31467---48735775806.pdf
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1606f16c03c0be---zirarurofos.pdf
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a15af3463b5---26487181596.pdf
    • 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_off000115b6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x115B6 16792 bytes
font_01_sfnt_off00012dcd.bin
e39c495138a38a711ca8d5b2cce9acb16baada76f9965d53b24eaa816fb6a929
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DCD 10452 bytes
font_02_sfnt_off00014546.bin
e7df8606ea0dc75841c9c3cc18bc9b6f1fb82af5c6161231d5107e6723215480
pdf-font-stream PDF embedded font (sfnt) at offset 0x14546 17268 bytes