Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfc0ff7b5fbd8042…

MALICIOUS

PDF

72.7 KB Created: 2021-07-05 15:18:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c0f153e23817a198cf452f378f3ef2d4 SHA-1: 4ec5cbbd6bbf8318a294450d31323a784e08efa6 SHA-256: dfc0ff7b5fbd80429d74c48a40ef96ea7241e6d937b35cd8b888c92fbea55ce5
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160afc2013c0b4---fepumusu.pdf In PDF document text
    • http://tyextractor.com/d/files/felalivijimaxedatakodaku.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/c8d7b5a02347b31c84454d805e670415/xarutijikebatoxopofutaxal.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a7055dbf4---37708356805.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/9ilkp4v5atmssr758e7gfbqiaa/95556533861.pdfIn PDF document text
    • http://bscartridge.com/pic/dofinap.pdfIn PDF document text
    • http://controldellaves.com/app/webroot/arxius/file/wakonefofikevubemon.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/16081243fb4f6f---xivupanesiletululapugogu.pdfIn PDF document text
    • http://marcobernini.it/userfiles/files/44160733225.pdfIn PDF document text
    • http://spencerrandlefamily.com/clients/864257/File/sesoxuvebarox.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8543cce0f---kasatot.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160939ebd28592---75193417245.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/bagod.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da0f86f22b4---70720016707.pdfIn PDF document text
    • http://syarmarka.ru/userfiles/files/vabopiposegubupasa.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160971f357cb78---rodigiruv.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/a3b7944d579a778ca70d1b3cb44efa2b/pezemu.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/4f26e8501e9d267197f4e61e94df3716/dovigagosuzewutak.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2221375589---91622502093.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=melissa+shatta+wale+mp3+downloadPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/1ea84b2cc544683d24378c36ad93013c/nifafogoxibu.pdfIn PDF document text
    • 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_off0000b786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB786 10808 bytes
SHA-256: e7e6bcb461125b309f5882edc8149d30725dea8a245b17319956a4f10ff6e9b0
font_01_sfnt_off0000d052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD052 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE864 16696 bytes
SHA-256: 0585c1b4a1a62328802bfa8ffbc0dc7cf58a38b9eab448ba91661f98d93924a1

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