Malicious PDF — malware analysis report

Static analysis result for SHA-256 069857cc93c2bf91…

MALICIOUS

PDF

84.7 KB Created: 2021-06-16 20:10:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89a7475cb732c4d5fabe574e5e124679 SHA-1: baba6e5478d458c4f0046f61c0e0b04e3af479da SHA-256: 069857cc93c2bf9199dc630a9b71063c418437beb0f57728443dddb8208d084c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised WordPress sites using the formcraft plugin. The document body, though heavily obfuscated, appears to be a lure related to search terms, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the presence of multiple malicious URLs indicates a high likelihood of redirection to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://smidgel.ru/uplcv?utm_term=good+words+starting+with+r+to+describe+someone
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093d3d87aec3---17667594385.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/3699eddeaea7e877ee13c34a3ed670dd/lobumakojekep.pdf
    • http://immodraft.nrw/images/architekten_agentur_images_/file/pozazenisasizebinebazeko.pdf
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e64df2f20e---roriregewegaxuvege.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bee829d7fd---mavemasax.pdf
    • http://www.ecvbrass.ch/user/web/file/91927222867.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f60087371---faminipibudelabevujagi.pdf
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/90538039360.pdf
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/9fbd8b1cbe82265d51b331c8ce776374/jiwupipuvibe.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c03411535---16079518516.pdf
    • http://aitrans.org/UploadFile/file/F1202105140958107409.pdf
    • http://yjsyrj.com/userfiles/file/85277916817.pdf
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a559ccabdcf---11672709420.pdf
    • https://tractorpulling-emmeloord.nl/upload/file/86337600.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/4fb0dbd83383856e2d1ae683179ef649/7412586226.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160902e961ef71---dojiletomerep.pdf
    • http://xahscw.com/userfiles/file/bebaxupizipuwitofejejet.pdf
    • http://www.alexgis.com/siteuploads/editorimg/file/2694037725.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • 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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010227.bin
aac7c651dfafa0204b3784e92eafd5731b51765765d5c392f351ab81ad871843
pdf-font-stream PDF embedded font (sfnt) at offset 0x10227 5372 bytes
font_01_sfnt_off00011451.bin
534ad5fb28c564abb5ff35a13e11d65ba852b440eec0f3f89ae8cd836d0b915e
pdf-font-stream PDF embedded font (sfnt) at offset 0x11451 10292 bytes
font_02_sfnt_off00013772.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x13772 4324 bytes