Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdf7d1ce3c7c844a…

MALICIOUS

PDF

80.6 KB Created: 2021-08-14 18:44:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e242381a21aa1949000c148a7296012e SHA-1: d7a0ec6ebd99ae43d7a1ec7bb4764779a6b7c0df SHA-256: bdf7d1ce3c7c844a54324831c8e9ec82f02019e3f242d73ff1147079de159023
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs, many hosted on compromised WordPress sites or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the structure and URL patterns are consistent with malicious PDFs designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://2ds-creations.fr/userfiles/file/xaxugu.pdf
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608906b874881---fidumid.pdf
    • http://mensagemcrista.com.br/ckfinder/userfiles/files/japamirededukul.pdf
    • http://vnationwide.com/userfiles/files/firixewokakedukun.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/27312b0311c6a02bc798865b2f3d66d4/98862015593.pdf
    • https://pannonfinanz.eu/editor_up/87304046641.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdf83d6b89---bozitiwutudusi.pdf
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b120ce95924---wabodefuvagabeja.pdf
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/4mj8knrvqs3v1gibbi20vve7po/43587588263.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160901d654a7e7---25924465277.pdf
    • http://grandp.ru/userfiles/file/7796084347.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c92cc2332d---parogavigonuliloxaj.pdf
    • http://lienming-rubber.com/uploads//files/202108110143448394.pdf
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/xedusadevadu.pdf
    • http://premium-t.info/files/files/29798829272.pdf
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/62345571495.pdf
    • http://alliance-vietnam.com/upload/files/7432160974.pdf
    • http://thinhhoanggia.vn/Images_upload/files/vuzupaj.pdf
    • http://staractivecollection.com/resimler/site/files/feterotete.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f29e1ec7f---97720580951.pdf
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/on579b4c1tj0rv7smh6lgmda7n/silajotakupojuluvavobarel.pdf
    • http://md-servicios.com/userfiles/file/bokokutebotolo.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=hack+for+cyber+hunter+pc
    • 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_off0000d893.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD893 16792 bytes
font_01_sfnt_off0000f0a5.bin
24fffcff7ea457fd0a53de1bfd93b67f83b757006bb7932ef74e49708decfba7
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A5 16940 bytes
font_02_sfnt_off00011c84.bin
084de70f77d502be281dcebb8ca00a486dce28738904a14f7fb11670c5fbaca6
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C84 10708 bytes