Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8ed92342e446310…

MALICIOUS

PDF

82.8 KB Created: 2021-09-20 12:30:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eef6fc34e7405297716a2ed08264c148 SHA-1: 530147828f082f96173c427def57a4edb4ccbda9 SHA-256: d8ed92342e446310a384b98daf2f68abbbe0b467e256213d0676907d03109d9b
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lure users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://rapet.hu/files/xesebigapexiwabekuv.pdf
    • https://olgunbey.com/upload/ckfinder/files/35575987553.pdf
    • https://actionsporting.com/userfiles/files/7498797287.pdf
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/b1f2e862ad4dab7a8b89be03013f3fa2/xasutesusufeluwujazoru.pdf
    • https://sapporopools.com/contents/files/toxapinewadigonunewuva.pdf
    • https://avistravel.activsport.ro/userfiles/file/dogebiduliritojalupifo.pdf
    • http://jszl-rolls.com/filespath/files/20210909223055.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16146546f52048---66191510662.pdf
    • http://myatkinsonfamily.com/userimages/fojafosidojugoge.pdf
    • http://bitree.net/ckfinder/userfiles/files/novaboladepalizuvojek.pdf
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613787260e11b---lezimudanunadexotuzewow.pdf
    • http://hoanggiaphatland.com/uploads/image/files/bogidesoselazomewexila.pdf
    • http://okna-kurska.ru/page_edit/_samples/userfiles/files/23262247515.pdf
    • https://renteci.com/imagens/file/78701468379.pdf
    • http://elcivan.com/admin/UserFiles/file/7663299287.pdf
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e0bf7a6753---87872052170.pdf
    • http://myphamhelios.vn/luutru/files/dugaximivurubu.pdf
    • http://familie-schiecke.de/images/file/33715686998.pdf
    • http://profitoolinfo.ru/ckfinder/userfiles/files/4063845473.pdf
    • http://cortocircuito.trialpanel.com/images/Upload/files/34914005314.pdf
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/3e542c13a9078a9aed9d535c46576606/kazafalefejafoxi.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/161434cab04950---wesopanodixebow.pdf
    • http://files.ibiza-ferien.de/file/21321864961.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=brothers+movie+filmywap
    • 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_off0000d928.bin
1d023004541645ea10003e0fac1f82778e05c5594ac75c18f3306fc0d7d72296
pdf-font-stream PDF embedded font (sfnt) at offset 0xD928 10840 bytes
font_01_sfnt_off0000f254.bin
cc753b2315fd42989cb2cc2e91674f96aa62ab94dcb420a717d9f847c561d058
pdf-font-stream PDF embedded font (sfnt) at offset 0xF254 20052 bytes
font_02_sfnt_off000125b0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x125B0 16792 bytes