Malicious PDF — malware analysis report

Static analysis result for SHA-256 c998cfa56b2a8c0a…

MALICIOUS

PDF

72.6 KB Created: 2021-02-19 00:54:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: b804daaab8a7870acac28e5f9e914b39 SHA-1: 442e762e29f879e24049b1a5516f7174db6b1df2 SHA-256: c998cfa56b2a8c0a477023dfdb5c0bbdab8db0705819f9d6642e8e167bd110b1
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI that redirects to a URL disguised as a search result. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/wix?keyword=st+patrick%2527s+episcopal+day+school+logo PDF link annotation
    • https://cdn.sqhk.co/konafomaz/5OLjimT/new_house_painting_cost_per_square_foot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388283/normal_602307860cf48.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481675/normal_5fc9ea445b755.pdfIn PDF document text
    • https://cdn.sqhk.co/saboretiki/ecjbzJR/simuzupafivubatuname.pdfIn PDF document text
    • https://cdn.sqhk.co/dutimapo/Jjjbcgi/big_head_soccer_championship_unblocked_66.pdfIn PDF document text
    • https://cdn.sqhk.co/fetedudi/ihcigjf/43159997280.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417030/normal_601a35754dda1.pdfIn PDF document text
    • https://cdn.sqhk.co/pobopuwubox/Lnodiag/hyperspace_game_ubisoft_ps4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375207/normal_601aef957c1c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382973/normal_5fe903686f233.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bobamexexaru.rf.gd/37249685977.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/chemex_ottomatic_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/9345330857.pdfIn PDF document text
    • http://vetuvadoxawiton.epizy.com/approximation_using_differentials_homework_answers.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE7 5640 bytes
SHA-256: 6fcc7c158e18664ca4d6092a0856c4ab867b3626c0eaee67c1f57c63842c8996
font_01_sfnt_off0000f21d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21D 10360 bytes
SHA-256: d7a4a8b8a4fd3ccbfa9abb6e72c73de1aa081d1853d2431e2c0631ac6d9da195