Malicious PDF — malware analysis report

Static analysis result for SHA-256 7363cfb780f8b4c0…

MALICIOUS

PDF

78.2 KB Created: 2021-06-07 06:59:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c46f8b7118facd2b32b5c5a1e316d6c7 SHA-1: 1700185715771afbc76974e82ca362cd84994dbd SHA-256: 7363cfb780f8b4c08796dbcbe1ab5c1229a2fcf6e31240e02d48cb85f08e10fd
156 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious content or downloads. The document body's deceptive title, 'Add yahoo to office 365 home subscription', is a common lure for phishing campaigns.

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://garglob.ru/uplcv?utm_term=add+yahoo+to+office+365+home+subscription PDF link annotation
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/2ov51r98ogth4mougqt423vph1/nokibuvakekozufezuvolaz.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/a50d9bd06166739035c459a34a6334f6/gemiwagilovikaruwegejew.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/50467215650987e480e32c93777cfccc/75777963583.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b52e06c15d---33017258844.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/bauu8mpgbghighu8qfrn26tdp4/78657524683.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/df27408d87bea434b7dcaed35bf6e9be/93530345392.pdfIn PDF document text
    • https://agenciaboom.com/wp-content/plugins/super-forms/uploads/php/files/m21roo58lqctv690bhpof0bb84/71070986775.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/wofonot.pdfIn PDF document text
    • http://nappsa.org/userfiles/file/napidupizeb.pdfIn PDF document text
    • https://gannat-ltd.com/userfiles/file/75044329917.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609748e25cef9---sibisabopobud.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072705b24955---topuribeneboxomupunopi.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/23480c0d6c8a8fb765ec3ef2d65ec19f/donomonukuwegijiveju.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/blkpnrandnqus81t289dc4qpuv/fotovotikutawa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BE 5916 bytes
SHA-256: 576d0015ee57684049bc5c7913a6d68a3ade6eccba7c1588e2e78d1046586cfa
font_01_sfnt_off0000f7b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B7 10964 bytes
SHA-256: 323d0fea8c9eb6e9b55b2dcd8876dfd2dfbed2a3367e39edf335cb459fa40d1f
font_02_sfnt_off00011d09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D09 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230