Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ee8bb30c1e05fa3…

MALICIOUS

PDF

85.3 KB Created: 2021-07-19 14:13:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 53e97983f7cea6a18b0a82922253a4e9 SHA-1: 2edde453ed510d614d084272fe601cacf46f48f4 SHA-256: 5ee8bb30c1e05fa39ad4a1c8dd30d087bbed930be799b4ba0a3c48a7fabf240f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous embedded URLs that point to various websites, many of which are hosted on compromised or disposable domains. The primary purpose appears to be redirecting users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://schokozentrale.de/idata/gukulejejiw.pdf In PDF document text
    • http://suamayin.biz/userfiles/file/pinisino.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/b73dffc43988135547c8d92b685ed8a7/36751779671.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/e191ecee2b770096c1eb05fbdd5961d2/tuvabumilegiwowuwokim.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/68230281352.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/5ca4f1b95d76a9e3dcbcc7c91e89d180/tapuzujisimopetigepixozu.pdfIn PDF document text
    • http://teerosy.com/ipp/images/uploads/files/dosatiw.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160746c4ed728c---pilumazifitid.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/mq9tnprjtn8s77vf9mp70ak2mk/61944245617.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608e771d101b2---16481086046.pdfIn PDF document text
    • http://kaies.cn/upfiles/file/mojota.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/thbqburfa0oakc6v9675d9u1ap/28031268478.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/3nvabu9cssrujo8g86k6e8gnbs/21945158470.pdfIn PDF document text
    • http://100gastro.cz/soubory/files/71593866863.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/c83f0fbf474529096ae1a017fb27bdfc/zutetubawewevusuzur.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/iqiggj5d72ehn4quqi4j16p84m/83876973741.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608d06fb19575---14876930381.pdfIn PDF document text
    • http://come2menorca.com/images/file/xojuderuj.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cde69c6e987---rozuroje.pdfIn PDF document text
    • http://www.addvanceo.info/userfiles/files/bowafakavepukujagoset.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/2509a68035c4846c379b81948498e199/fuletalefoxa.pdfIn PDF document text
    • https://local-atlas.ru/userfiles/files/sibumobipoxowe.pdfIn PDF document text
    • http://fatamorgana.fr/uploads/assets/file/23251472200.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/54d2cad3ef65667ac91bd07fe77f2d0f/27351332124.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/f0cf973af3a03b3037340fbae98c34b3/muvever.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=woodland+burial+sites+north+westPDF 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_off0000ebdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDF 16696 bytes
SHA-256: f313c3c41f18c6a48cee1b52fdc3e41d09c7bac017e1204422c326b658e1aee3
font_01_sfnt_off00011756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11756 10664 bytes
SHA-256: 423a11c70bec3c1abbbdc7589f16a200b1440357967c574d366569546504a53c
font_02_sfnt_off00012fba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FBA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1