Malicious PDF — malware analysis report

Static analysis result for SHA-256 bba7cd50fa69858a…

MALICIOUS

PDF

80.1 KB Created: 2021-05-12 13:28:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad7d5186f6263e4f257a12576142f2b9 SHA-1: b5cb6ef0fc9aa0806361441927b3a76253fbf865 SHA-256: bba7cd50fa69858ad1287962e89931ee3df798c058b84a2c74c88273afd59819
156 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous links to compromised WordPress upload storage and disposable hosting, suggesting a link farm designed to distribute further malicious content. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing or malware delivery campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://agatanorek.com/files/file/11175518820.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083e2ee43ce0---pukosewofeg.pdf
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/16081c3743d481---28059850475.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/uq6bhqt0778ep6fcmh0pa8knc3/63457707290.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071828d3e24f---86025521626.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/5693985592768115198afb94fc2a6703/zijipokabawudejobib.pdf
    • http://arcomproltd.com/userfiles/file/12900391099.pdf
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608b8d12e466d---ledupinefowakinar.pdf
    • https://ascinfratech.com/clientprojects/trading/file/gedexobuxo.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3c0114b6d---19903096275.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160700af1e7b6e---25492045864.pdf
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/cumorsk0cs4rm6l7tqmk9moluc/xoxor.pdf
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3b6a10a44---bupuzexabumo.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6fd2a17a5---44750855990.pdf
    • http://alexanderkanevskyartgallery.com/clientMedia/file/47940466194.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607080999b774---55450258053.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f72642824c---tereruvavapizigabujilije.pdf
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607de8dbb4be6---neluzaziduwe.pdf
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/ec3301a24cb794c330f56d5553a6ab29/votekotategowufudujudafi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=cabanellas+diccionario+pdf
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fab3.bin
f431a057e12ec750040d0454a922677776fa386881c9b80d3972cf1b1ea3d231
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB3 5196 bytes
font_01_sfnt_off00010c5f.bin
2bf598124a2bbb72da18681b4e51223bc9777b0e26abae219ca26b8c8c63ad37
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5F 12008 bytes