Malicious PDF — malware analysis report

Static analysis result for SHA-256 a89be69bb2955834…

MALICIOUS

PDF

73.5 KB Created: 2021-09-08 01:32:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f4baa283d06ca69244beaf6d789a94c2 SHA-1: 763166b0ce55b32df48cde0d0182456ed8027834 SHA-256: a89be69bb2955834e6b91b3e67a8057de70228754295c4cce523b1750bd5bdee
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which are identified as link farms on disposable or potentially compromised hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through these external links. No scripts were extracted, but the structure and URL analysis point to a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://fashionflutters.com/ckfinder/userfiles/files/63567385866.pdf In PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16098599d40aad---73476662349.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/161273d32e2cb3---72254680052.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/8562664fdcb20eb61874354bcdc6e59f/mireminasezudizazetukuk.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/iiq7vmp9uiosgv8cse24bbs3lh/punovezilokizaduzorinofon.pdfIn PDF document text
    • http://horizonpestservices.com/userfile/tikoduxogorobozevo.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ab33a04d2---5606225442.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/fe1f0cb4e0d5a7671a5d2995fa5b9c04/62990622248.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610959f6d16d8---77134166997.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/62e72e0429664a8eb075c579f86482f9/63050426606.pdfIn PDF document text
    • http://dvg.asia/ckfinder/uploadfiles/files/72592726197.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/3f9f2b8545308d7cf707393e5d5e191e/tirorafiwapobejid.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/431f0cef18edbf371ab392a5a2dc97e9/8123130376.pdfIn PDF document text
    • http://globeksa.com/ckfinder/userfiles/files/4926701503.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/88320c5b80d402bc74f4ae9c21387a7f/gumoralop.pdfIn PDF document text
    • http://ac-kenigsberg.ru/files/file/refeve.pdfIn PDF document text
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/2930b4ce77r47dgnq4on2ffadg/23800717501.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/xedogifirafatonikubifuje.pdfIn PDF document text
    • https://bahamianbrewery.com/ckfinder/userfiles/files/mifinekemeretadotilifiro.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/12444183580.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160869a7d65d65---31770567475.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161009cd759b1e---mepufujiwidufolipevusofow.pdfIn PDF document text
    • https://fotojursa.cz/userfiles/file/98659514410.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1c99f448df---5007455956.pdfIn PDF document text
    • https://asiajitu.com/contents//files/kudepifovalebujuwe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=cat+quantitative+aptitude+formulas+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_off0000bcbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCBD 16464 bytes
SHA-256: f8d288df8bbf619adc3c88f4c68beae8f4a631f0b2e88bb2d2e3379e28f369da
font_01_sfnt_off0000e672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE672 11000 bytes
SHA-256: 678c1e94e0ea8d9d3d81bd4bd6f9e3fea310e820b1d88a2bb83e38a3688d0dd9
font_02_sfnt_off0000ffd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1