Malicious PDF — malware analysis report

Static analysis result for SHA-256 f102e6240a301e0d…

MALICIOUS

PDF

76.2 KB Created: 2021-09-03 23:11:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6155bc15e3f6fd65ca5df79ca22de3f0 SHA-1: 3a10b73a85ef9d0b2b6b6e1a5e14ec16771cc28a SHA-256: f102e6240a301e0d8d036a815df8acc1476e0d89af43f3a41d61d0f062dd0c4a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to various websites, many of which appear to be hosted on compromised or disposable domains, suggesting a phishing or malware distribution scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or serving a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://koncnc.com/genelresimler/file/14947968245.pdf In PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084fdc61ccb8---neruvoru.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612938c3eaa7a---20396583976.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/28a17b223eb242e24ff586e3529e4094/gikunarumafajor.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/5931488749.pdfIn PDF document text
    • http://nhasachnguyenvancu.com/Images_upload/files/60807607077.pdfIn PDF document text
    • http://keralabiblesociety.com/fck_uploads/file/84602644835.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/c05ed27604d61c9ffe169c8b2632c48d/11693604312.pdfIn PDF document text
    • http://quatanggiabao.com/images/uploads/files/lefarusakudode.pdfIn PDF document text
    • https://butchercurnow.com/img/shop//contents/zufidad.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/b35cfebef8140eb508187417b39deced/jakanaderuvorif.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a227fe69bce---14120029646.pdfIn PDF document text
    • https://www.letspassdriving.co.uk/wp-content/plugins/super-forms/uploads/php/files/olf4haaj16c8s26m96i2m9hv68/bejezefoxisevivopiwinu.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e123bca74---zuvalirerimudanokotepem.pdfIn PDF document text
    • http://riversedgefm.com/files/file/66282107950.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/161179fd7bbff0---jozuwex.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a2cbccbc7---zesafiwotesod.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210716_280CD83AFA07C90D.pdfIn PDF document text
    • http://skyline64reunion.com/clients/e/ec/ec378541aa9b73e2b99de5ca5545ec21/File/19514371963.pdfIn PDF document text
    • https://hv2barrier.com/application/third_party/ckfinder/userfiles/files/67072279382.pdfIn PDF document text
    • http://galluccifaibano.it/userfiles/file/gafedomozepito.pdfIn PDF document text
    • http://zekejozsef.eu/FCKfeltoltott/file/moferekivu.pdfIn PDF document text
    • https://mimpishio2.net/contents//files/73225801812.pdfIn PDF document text
    • http://satakantaresort.com/user_img/files/10811906813.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=reciprocal+teaching+style+in+physical+education+pdfPDF 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_off0000c4fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4FD 11160 bytes
SHA-256: 889774d956f729e1c2ad382b76ef9278ef711b57b8c74a4ea11d20df6c928241
font_01_sfnt_off0000dece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECE 16876 bytes
SHA-256: 39f9061fb629d847d4940ffb8a0a1f7e01caa959c2aa4623070bf31cb5f0e30b
font_02_sfnt_off00010a6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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