Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0ff85c2508f5ec0…

MALICIOUS

PDF

80.3 KB Created: 2021-08-29 20:48:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c8596f698a47316a3af5af227186fcd5 SHA-1: eec6a6550e18fc8e0d663274dd999d8f9ebd3494 SHA-256: b0ff85c2508f5ec0e4349e9b47e623200630ea1397945a5cd6ed286cfb440fd1
156 Risk Score

Malware Insights

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

The file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to websites hosted on compromised CMS platforms, likely to lure users to phishing or malware distribution sites. The presence of multiple PDF link farm heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/b0lf3kfnvb6r22ofqvepjtds66/76016230702.pdf In PDF document text
    • http://skyline64reunion.com/clients/e/ec/ec378541aa9b73e2b99de5ca5545ec21/File/76928600102.pdfIn PDF document text
    • http://xn--80aantfcaehjbxzf1m.xn--p1ai/userfiles/file/nasinoferedukonuzu.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/72606200255.pdfIn PDF document text
    • https://mamo-tato.ro/userfiles/file/fofuvefemonis.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/16246479797.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e94bb8c425---23665506275.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16083d9c5c2cfc---64912554888.pdfIn PDF document text
    • http://francescofesta.it/userfiles/files/jasoginedazi.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bffaa3d55cf---lelefetagufoto.pdfIn PDF document text
    • http://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gabar.pdfIn PDF document text
    • https://ubranni.com/uploader/files/48662054996.pdfIn PDF document text
    • http://www.victoriousintl.com/new/resource/files/jakunaputoguwof.pdfIn PDF document text
    • https://viveironativodevicosa.com.br/ckfinder/userfiles/files/31837367199.pdfIn PDF document text
    • http://farmaciafasolis.eu/userfiles/files/nadukutomozexosetudoxu.pdfIn PDF document text
    • http://dpsszczytno.pl/photo/file/22736308654.pdfIn PDF document text
    • http://elvirajogsi.hu/ckfinder/userfiles/files/79399532432.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/17259138105.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c47c50bb227---fikodexovolekejobiz.pdfIn PDF document text
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/fasumokokiwibe.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/40bc453df968dd6ce5fd2d85bd38f7a8/mipufobikowusabixa.pdfIn PDF document text
    • https://nhakhoaanphuoc.vn/uploads/files/rovezomoni.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+draw+realistic+spidermanPDF 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_off0000d7dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEF 16564 bytes
SHA-256: 2f8ec922c00f287346556b9f9eb51dc88f3871a1c96ce714d884b35dc1935b89
font_02_sfnt_off00011a9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A9D 10752 bytes
SHA-256: b7f7ae0f179e3618136f30881f4c61f23becb178c32c35930db2930a1efd7885

Open this report in the interactive analyzer, or submit your own file for analysis.