Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad6724455dc63d8d…

MALICIOUS

PDF

77.2 KB Created: 2021-07-02 04:29:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e9953775e6f2342b0f0a96dc723186de SHA-1: 59ea05a707b0675bd30162a3d0be7ed067e3b35c SHA-256: ad6724455dc63d8d88e7c50b61ef0a71c47f7f8a10483fde75606e0eb7319b3c
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL analysis and heuristic firings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/7q0nnhkc7fct7g6a0kro98n3fr/seralobazu.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c1225d560a0---49647966992.pdf
    • http://centroolosprato.it/userfiles/files/jizobutidaxik.pdf
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/3af82bed0d1a57b7afc676c1ea9f632a/41973070042.pdf
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1288d630a5---72693364621.pdf
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/57635ea53ad557b88f328047dd029e74/sitifudelavixuxasibu.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079ea809d628---juwoxogepaxumo.pdf
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/914075554e33f94cf1f28f05bd8ff0b7/35403457755.pdf
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/nuu00joh6v1kag1u479us1iun6/1528535707.pdf
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160774f651a1e1---73129911533.pdf
    • https://pmms-online.com/assets/file/39076704848.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b0ab5442c---70728902676.pdf
    • http://dochoiotovn.com/uploads/userfiles/file/pajot.pdf
    • http://ankamet.com/userfiles/file/punarategipalofobe.pdf
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa23423b982---wukavotazanume.pdf
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/30f3b66ca10d09a23250b9e2c4f1371a/suzej.pdf
    • http://bigyikesmedia.com/home/xtremweb/public_html/consultinstitute/web/upload/files/60754944697.pdf
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/08c5e104f3984db4c249de3a5fb19478/22157144896.pdf
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9e17adcfa---40904352850.pdf
    • http://cameralehiep.com/hinhanh_fckeditor/file/kakinakojobuw.pdf
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1607c85487b6cf---39600902964.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=the+x10+private+pool+villa+and+resort+khao+yai
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/0f06a9c3ae79010702d4a09a98574c96/18219900501.pdf
    • 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_off0000c68e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC68E 16792 bytes
font_01_sfnt_off0000dea0.bin
816ac386462119693a5f2a44de6213374822fb6b2dc796aa8461534dd5e66301		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA0 17176 bytes
font_02_sfnt_off00010bdf.bin
c6b58d234dd3b0e5fa9610d5c29203602213804ac1ae65115f036e4cc085fb75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDF 11000 bytes

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