Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8faaa1626d90df9…

MALICIOUS

PDF

90.2 KB Created: 2021-04-29 01:10:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: bd206955aa51cef78dd1775abe401229 SHA-1: a3e20568a7eea6652dad8247d33fd664563c7760 SHA-256: f8faaa1626d90df92bb9652ace613dde5f335b6f20c688df9cb12d22d2e2c8ab
96 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ClamAV and an ML classifier. It contains embedded URLs that point to suspicious domains, one of which is likely a phishing lure. The PDF structure and embedded content suggest it's intended to trick users into visiting a malicious site, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://baarspo.ru/strik?utm_term=logic+puzzles+for+elementary+students+pdf PDF link annotation
    • http://tuvivukaroj.mygamesonline.org/govelojutaremijaralepoji.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478932/normal_60010f3176923.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483388/normal_60052d3b81336.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/gjogdzP/71601376730.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390074/normal_600a9f9eeb865.pdfIn PDF document text
    • http://kazimibi.getenjoyment.net/78046682479.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/hjfDYjc/21075609775.pdfIn PDF document text
    • https://cdn.sqhk.co/kixikeli/ngdvQ7k/xudazuwesirerasijiguj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412573/normal_60070da98628e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383692/normal_5fd09857f05c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367286/normal_5ff68e7fbec50.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408340/normal_5fc7fbf4b3c4f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470553/normal_5ffc7f46809fa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421365/normal_5fceeefec942d.pdfIn PDF document text
    • https://cdn.sqhk.co/bufutoje/2jchhOa/at_t_prepaid_phones_32gb.pdfIn PDF document text
    • https://cdn.sqhk.co/nejibija/RFhdqLB/free_casino_games_slot_machine.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jupevesu.atwebpages.com/translating_words_into_algebraic_expressions_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/59702882579.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/mandatory_reporter_training_iowa_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/accidents_reported_today_indianapolis.pdfIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/4535398396.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/wufunusofi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000115f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F0 5568 bytes
SHA-256: b727dcdf4c22d3daef6926677711d44a4b1dd61b433b85ae746e4c63e2f1bb01
font_01_sfnt_off000128df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128DF 1728 bytes
SHA-256: 0810ce0371bb48a6dbbb6c56d423a1e4bda4455f4638deeed9c91ec23a796c96
font_02_sfnt_off00013177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13177 11576 bytes
SHA-256: d77bdfeb35e3ee614a33017d0e7d9e457aad5d2ce21bd7cc1b75f9af2fc30467

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