Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bc49f06ef3f6982…

MALICIOUS

PDF

88.6 KB Created: 2021-08-13 08:57:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 334d71880982f61b3e8f7640ff01b39a SHA-1: cc10ddd209c93ad0a6b0d9d59442692019343290 SHA-256: 9bc49f06ef3f6982291f903dc3ddaf60c239fc655cfcb9c7498c23185cb3404b
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 disposable hosting or compromised CMS upload directories, indicating a link farm designed to distribute malicious content or phish users. ClamAV and ML classifiers strongly indicate malicious intent, specifically related to phishing and trojan activity. The document body is unreadable, but the heuristic findings and URL analysis are sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://clap-bas.com/userfiles/file/2071915601.pdf In PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c26ca932ced---85662406307.pdfIn PDF document text
    • http://m3hotels.com/userfiles/file/bujewinaj.pdfIn PDF document text
    • https://frigosztufi.ro/ckfinder/userfiles/files/gusodakomeredasosux.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/92885832c142395ed2f8c85f081bd12d/pukigil.pdfIn PDF document text
    • https://esperanzadeavila.com/fotos/file/tijid.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607fecfbdccf1---9749786226.pdfIn PDF document text
    • http://bmhs1964.com/clients/a/ae/ae3b7fe25fc1fd458a9bccd7578bee9c/File/xanerotokexigalemunuvud.pdfIn PDF document text
    • http://nobody-films.com/bpms/includes/fckeditor_uploads/userfiles/file/24264265533.pdfIn PDF document text
    • http://metalzilembo.it/userfiles/files/95012644012.pdfIn PDF document text
    • https://proxus.nl/file/10579100150.pdfIn PDF document text
    • http://stpatricksreunion.com/clients/84553/File/16798514381.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/kusawepaxenunoziruteduk.pdfIn PDF document text
    • https://sunrise-photon.com/upfiles/editor/files/40006784051.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210611022200.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608c428971f0c---39425224758.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/96219808207.pdfIn PDF document text
    • http://krakow4you.pl/krakow/files/17710171806.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609a54208851a---86289324724.pdfIn PDF document text
    • http://geobrofab.com/clients/d/da/da7cd3953015cd63472398095fc1fcdd/File/gidimogadi.pdfIn PDF document text
    • https://upaspor.com/resimler/files/wunavowolo.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/93531071069.pdfIn PDF document text
    • http://maybomnuocdanang.com/uploads/image/files/jesurapumezurezewodadozit.pdfIn PDF document text
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/53404899138.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=fnaf+the+twisted+ones+book+reviewPDF 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_off0000f584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF584 10768 bytes
SHA-256: 05d8c2d6d4b96bde9596c7d857852d3443f9faecbb22d7f05db59d31b1861370
font_01_sfnt_off00010e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E46 16860 bytes
SHA-256: 1faa6f28371d81d3a37d06c4f2c4e4524fd717c0a03e3e3aa10aa6738fdec725
font_02_sfnt_off000139d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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