Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7fa532d7670b3eb…

MALICIOUS

PDF

72.9 KB Created: 2021-09-08 04:16:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 20a53414add66c6ae5281b794f55e8a0 SHA-1: 5d1350f455caff59c19c2d65abb22618508588f8 SHA-256: d7fa532d7670b3ebc907bc93846296c10034a8568e37ddfaea1875883dba11a6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs pointing to potentially compromised websites or phishing pages. The presence of multiple external URIs and link farms on disposable hosting suggests an attempt to distribute malicious content or lure users into fraudulent schemes. No scripts were extracted from this sample, but the overall structure and URL distribution are indicative of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://chcial.ru/uplcv?utm_term=form+1000+fillable+pdf PDF link annotation
    • https://12tiga.com/contents//files/36840611061.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/b52178f8b12f5dab1152c9ae378a3b37/75824356899.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/ff53b345ed538bda5ef10e071e58fe0d/94576584095.pdfIn PDF document text
    • https://art-eria.pl/mandarynka/pliki/files/rapidoz.pdfIn PDF document text
    • http://wannawwannie.pl/userfiles/file/rilubariwaxuzade.pdfIn PDF document text
    • http://arqing.es/ckfinder/userfiles/files/39034243685.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160e884f7bae10---xizolirifuni.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/dls3odcsmvnpsrh4rq9ob0thbq/buralaxe.pdfIn PDF document text
    • https://internationalmedia.com/userfiles/file/sarawaxakoboruzewija.pdfIn PDF document text
    • http://ytlcases.com/userfiles/file/vefesejuw.pdfIn PDF document text
    • http://www.velkoobchod-man.eu/ckfinder/userfiles/files/bowavajuvidevebasulum.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c350a75c902---maguxemijakaki.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16085441199d59---44603177131.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/442cd5ec0ec54095e30c2f3340a0f7da/bijijevejamuzuj.pdfIn PDF document text
    • http://otvorene-srdce.sk/userfiles/file/59844482167.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a1661f01642---kogabazesube.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/9ggc2t361ld0d4scocefb1ep4k/72104382669.pdfIn PDF document text
    • http://thietbixanh.net/uploads/files/65663582532.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/6e5fcjkgdsgdjd93e1i333mbp0/lobomid.pdfIn PDF document text
    • https://www.cylinder96.ru/admin/ckfinder/userfiles/files/jugikimaweke.pdfIn PDF document text
    • http://geose.ru/userfiles/file/vurukezigetin.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_off0000bb23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB23 10580 bytes
SHA-256: d80daaeef501187fa6863b45769ea64f328fc822425557c25a432c3fc40308d8
font_01_sfnt_off0000d2fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2FA 16824 bytes
SHA-256: 43e9a55ccfa7d6481abfbdf43ba9b3623d46bef7f1237baceb9cf963fe751262
font_02_sfnt_off0000fe87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE87 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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