Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c8062a00da5581e…

MALICIOUS

PDF

94.1 KB Created: 2021-09-10 07:08:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d3de3a0dd59c51fe3f777a75f84346dc SHA-1: 470af8d8f8e9fff1a0e477caf3912f6f1cf63845 SHA-256: 5c8062a00da5581eb6f7fca47e20e851ab8ac34b7a71348c7adbb47ca162dc09
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised websites or disposable domains, indicating a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier strongly suggest a phishing or trojan payload delivery. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=rules+of+integration+multiplication PDF link annotation
    • http://braciszewska-klimek.pl/fck_files/file/63517924924.pdfIn PDF document text
    • http://zatexpress.com/upload/userfiles/files/gamibijosinolez.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/oh3e85dc9kb1uioslsq42c7cj7/22011613051.pdfIn PDF document text
    • https://giritrademark.com/content_files/files/sefudad.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613a721e30c18---92141523998.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136aba40293a---gulumufodabetudagefunetif.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16136b9c1b8218---54258826222.pdfIn PDF document text
    • https://www.mediawerf.nl/bundles/store24backoffice/ckfinder/userfiles/files/23299959062.pdfIn PDF document text
    • https://lionkingbali.com/uploads/file/51626282620.pdfIn PDF document text
    • http://dkind.net/userData/board/file/70906277956.pdfIn PDF document text
    • http://edituj.cz/res/file/55963529154.pdfIn PDF document text
    • http://pazarziraat.com/userfiles/file/37119083193.pdfIn PDF document text
    • https://rajatotogroup3.com/contents/files/xiwajunefoxaruwimepar.pdfIn PDF document text
    • http://crm333.com/documentos/file/42376847841.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/vufideg.pdfIn PDF document text
    • https://institut-arabe.org/ckfinder/userfiles/files/83602084344.pdfIn PDF document text
    • http://jullien38.com/ressource/site-image/files/fafawedifofozexubaf.pdfIn PDF document text
    • http://farmaciafici.com/userfiles/files/modosaririsisibilowu.pdfIn PDF document text
    • http://hsaltsj.com/uploads/files/60206787455.pdfIn PDF document text
    • https://nisahanpin.com/calisma2/files/uploads/68493498810.pdfIn PDF document text
    • https://congchung7.com/upload/file/28011585287.pdfIn PDF document text
    • http://s-privod.ru/userfiles/file/witirofu.pdfIn PDF document text
    • http://ncdesign.it/userfiles/files/78878173288.pdfIn PDF document text
    • http://sinocelltech.com/filespath/files/20210901082054.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_off0001070e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1070E 18880 bytes
SHA-256: fec92e9114a39e1b71a5dbdfb116e9c5e87c1d801b1ee35c5872b0e02b851fca
font_01_sfnt_off000138fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15115 10968 bytes
SHA-256: 7ffa8321afa2f201e3aef53c4c7a4d49f01cf40d958509defdee50613e6e3292

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