Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddc5f0ce86f06f93…

MALICIOUS

PDF

80.8 KB Created: 2021-09-16 03:01:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 45cd4c170ef56aac696d18d3cfaf6eeb SHA-1: 5e6d483ce8e5b1872e63281c0aec7ed382a6b6d5 SHA-256: ddc5f0ce86f06f93bdc572634b3ff6c2b21d31d1517e600a34381e920395a8fc
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 CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://panegovernance.com/ourprojects/chowki/UserFiles/file/21723949561.pdf In PDF document text
    • http://eperon-kochersberg.com/img_db/gaxibebafoxenad.pdfIn PDF document text
    • https://dichvumoinoi.com/ckfinder/userfiles/files/53995489346.pdfIn PDF document text
    • http://pure-chiral.com/upload/files/votubulawenelukixowozudel.pdfIn PDF document text
    • http://kyea.org/imageuploads/leniresemexomivera.pdfIn PDF document text
    • https://hse.tw/upload/file/meferuwir.pdfIn PDF document text
    • http://americandeliorder.com/uploads/files/83175000142.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613347cf10376---96766388256.pdfIn PDF document text
    • http://chaukitchen.com/uploads/files/11964839902.pdfIn PDF document text
    • https://247christianity.org/fckeditor/userfiles/file/mutigawinubosokapile1630861908.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/14e69c8c719b2c995e88bec019262cff/12325964045.pdfIn PDF document text
    • http://osc-pribor.ru/products_pictures/file/54940606025.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16140c1b894111---21582892831.pdfIn PDF document text
    • https://www.hasmow.com.au/application/third_party/ckfinder/userfiles/files/9327693495.pdfIn PDF document text
    • https://osakaav.com/userfiles/files/budadekurazulimofosew.pdfIn PDF document text
    • http://www.mamafoundation.cz/ckfinder/userfiles/files/wevanomojuwibe.pdfIn PDF document text
    • https://www.syria-report.com/sites/all/libraries/ckfinder/userfiles/files/68125401282.pdfIn PDF document text
    • http://sibzakon.ru/ckfinder/userfiles/files/numubopidagedaxuruvuver.pdfIn PDF document text
    • http://mxm-hosting.nl/img/editor/file/53926766005.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613748b379807---fofuxaforeribitezo.pdfIn PDF document text
    • https://barrier.exma.cl/ckfinder/userfiles/files/18128272615.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=the+double+d+avenger+watch+onlinePDF 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_off0000d679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD679 10836 bytes
SHA-256: 076f07ee452e47b8d4d8d26bdd1acdc3ec79df7dc8252b827371476124a68bcd
font_01_sfnt_off0000ef3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3C 17900 bytes
SHA-256: 04b53b62c559c08d6734248b65f55655fdef19a845cf0be30b5f7056019fb8e6
font_02_sfnt_off00011da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1