Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaede8f610bd4b6b…

MALICIOUS

PDF

64.5 KB Created: 2021-05-31 23:09:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74af0f6406cae75d3052898f78c0097a SHA-1: e524e48670437b950aa51d9879a762516f814deb SHA-256: aaede8f610bd4b6b6cdaac1b6c70c3770c583d28b8844aa9c744964d3c1d1c65
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV specifically identifying it as Pdf.Phishing.Trojan. The document contains a link farm pointing to compromised CMS upload storage, suggesting an attempt to host and distribute malicious files. The presence of numerous links on disposable hosting further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9516

Heuristics 5

  • 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
  • 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://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/2b9922996e2149ff309b17ca5f192efe/54684626838.pdf
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a94bd94923b---suwoxebuluzigiwiru.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608627502c219---lolevererojalep.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160abb2547ec01---9094845744.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/579tsvnm7ppqii41v6t104d590/92746020123.pdf
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/59c95cc0460a6750436f6a03a2522f87/25419981421.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/t6dhrovuhageoqim559m2pesc2/19093759304.pdf
    • http://aep-tc.com/cache/fck_files/file/73242357587.pdf
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/9ca761da5dfbba7c071ae16302eeadd7/bozekezabosilas.pdf
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/i10qhkgvkhukven126gcj86ont/76943252958.pdf
    • http://bocghebinhduong.com/media/ftp/file/99844837212.pdf
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/23f24762728fc1bf9baaac51dc76a61e/punobavidalumepola.pdf
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb985200a0---7547674866.pdf
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/e81ea878b1e3c6d81d3f9c5b4f1d8453/20509013453.pdf
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/5u6mimv0lkr4hal9s5pgk22r02/67489647041.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d10516471---rijekugobisosiritojexepe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=kawaks+neo+geo+roms+free+download
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e13a.bin
ffdb972d7dc427b7eafb2685ee756edbbe99d08b925e2f044f878962d6706044		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE13A 3164 bytes
font_01_sfnt_off0000ec94.bin
a13c62f3c61fbbbf4bdae0ce866dae3173b219b1a39ff38b373b47255dfe3a5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC94 5352 bytes

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