Malicious PDF — malware analysis report

Static analysis result for SHA-256 714893af0432d55d…

MALICIOUS

PDF

100.0 KB Created: 2021-09-05 19:53:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 60e63cf2b0a7e1ebf14c1e020c4ee2f6 SHA-1: f4c26d787572b019905556f1176731964a11f0f3 SHA-256: 714893af0432d55d90f3f6ff2c85f372dbcfdd92b7004b74cf5339e048d2c2af
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 potentially compromised or disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://ctsgroups.asia/images/file/85902835814.pdf In PDF document text
    • http://4bx.pl/public/file/79390240193.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/bfuv0cbu0md8fsfce02dvollrf/wuresuloxuvovisap.pdfIn PDF document text
    • https://parisnordmedical.fr/docs/file/18833914042.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/86882657833.pdfIn PDF document text
    • http://bm-shower.com/userfiles/files/nobexifadopakawosekav.pdfIn PDF document text
    • http://musicpark-live.de/userfiles/file/vewegokul.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/roxusewe.pdfIn PDF document text
    • https://podimercrm.com/img/files/vuneb.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f41133d4bf5---58870318464.pdfIn PDF document text
    • https://shatalarab-llc.net/userfiles/files/godafuvulezawaroxanaj.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/xexugoku.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/jrnjs8um7t8bo1lnlooeae7k05/tuseziregikewitakeral.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/3b42b6db190c55c298dd51f8fe90f4c1/velowa.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/11152100902.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/181017314462.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/5dd2a6b15f0581a86a7c1dd9e0144057/46913279727.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f709c4893---musajugijaxazojovejewaz.pdfIn PDF document text
    • http://abwingsmd.com/uploads/files/43544586340.pdfIn PDF document text
    • http://sevvalturizm.com/rsm/files/30401900955.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16077b18ab2f02---55761314510.pdfIn PDF document text
    • http://samtekelektrik.com/files/99909682910.pdfIn PDF document text
    • http://mamnonlittlesun.com/upload/files/30005352576.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16076d76dbf44f---87820842719.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c671d90957f---33955293643.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=dishidrosis+o+eccema+dishidrotico+tratamiento+pdfPDF 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_off00011e35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13647 19528 bytes
SHA-256: 8ae599abc4a726a977b7904831878e3b0c024dcf2cf9a48441e213cde79e4ead
font_02_sfnt_off000168cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168CB 10840 bytes
SHA-256: 2ee1bed98cf899b538dd33d95edc79aa734c429b870c8d030fd71111e28ce4d6

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