Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f622cb8145dc7d7…

MALICIOUS

PDF

221.5 KB Created: 2021-07-07 01:47:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 11cb4b5ee9c7ae69d81315bf0b563350 SHA-1: 1085680838e7028545d1c45b776f7c1b1aded647 SHA-256: 7f622cb8145dc7d7c9aa51833e426a2edec0379c63b42e0a51348b5ac4d86ef2
166 Risk Score

Malware Insights

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

The sample is identified as a malicious PDF by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam. It contains numerous links pointing to compromised WordPress upload directories, suggesting it is part of a campaign to distribute further malicious content. The document body was unreadable, but the heuristics strongly indicate a lure for financial fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • 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://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16082a310d708b---kisagoke.pdf
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bedd3e48e91---fuberoronedoxakujubeto.pdf
    • http://fluidearthconcrete.com/userfiles/file/neduvafurataz.pdf
    • http://jjmcp.jp/userfiles/Image/file/gifozorifutik.pdf
    • https://nhathuydesign.com/wp-content/plugins/super-forms/uploads/php/files/pqhj7ekp22jjae1vmf88cr3eoe/bonufoniwidopalij.pdf
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b99abdc2fc---56875437596.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/aac8f2dfaadd1b5e9aeffb59f8a36966/4148124178.pdf
    • https://zulapin.com/calisma2/files/uploads/basabapumikulabetasafas.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef93e80176---19413679192.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071f98d3c634---rozixarif.pdf
    • http://vattucongtrinh.com/userfiles/file/resikavu.pdf
    • http://fpsh1980.com/clients/7/7d/7de5299bd6bdc19cdd6b275c058e9c4a/File/57592208501.pdf
    • http://lyjclinic.com/ckupload/files/68780513060.pdf
    • http://christopherspubandgrille.com/userfiles/files/dosurigobebuwonafo.pdf
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/a0c3129ce3d61a114e674a21ebe0063f/71545391699.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a9cc7893381---juluxebamusejanipuwegopu.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1609dac2234e15---jaxobipijitize.pdf
    • http://falconfam.com/ckfinder/userfiles/files/patufajuxubozejegilil.pdf
    • https://fallsplat.se/file/fefobawixelo.pdf
    • http://hungthanhauto.com/luutru/files/bobejodonagupusil.pdf
    • http://shiokuda1.com/contents//files/pupidux.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=adventures+in+middle+earth+loremaster%27s+guide+pdf+free
    • 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_off00030783.bin
47fee2a50f77a710e694b35fcb2434b7063b54da2d3e71c4333fd075f3cfa7aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30783 18080 bytes
font_01_sfnt_off00033608.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x33608 16792 bytes
font_02_sfnt_off00034e1f.bin
4b9c8b0721ac154a6344f80f1d13cc664b793da2ca306811746dbd13456f7f5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x34E1F 11124 bytes

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