Malicious PDF — malware analysis report

Static analysis result for SHA-256 39344aedfcded0b3…

MALICIOUS

PDF

77.8 KB Created: 2021-05-30 18:55:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 986af00fca7389892c73bcd0ddd59bfc SHA-1: 2d622828563d7029c97de3af1bc80f33ab0d877d SHA-256: 39344aedfcded0b39778c602c5a0c81dd6fd10977c94c7de88ef304eab3ff97b
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, suggesting it's used to redirect users to a malicious site. The document body, though heavily obfuscated, appears to be a lure related to a microwave issue, consistent with phishing or social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://midufefew.ru/strik?utm_term=lg+smart+inverter+microwave+not+heating PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403130/normal_6041f088dd619.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374518/normal_602a74e9b3bed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370090/normal_604459f64586d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383917/normal_5ff2123e7a33a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486550/normal_5ffdacf9898b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487186/normal_600deb179a75e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404292/normal_5fc943c344e92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485012/normal_601a258e0e96c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384304/normal_601ffeae1f5c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467298/normal_5fdd95d942471.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449779/normal_600ea81534a44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388067/normal_606c7e25a9450.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424347/normal_5feaec01a950e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3f7217d-9856-41fa-b89d-5cacfd9c779d/fizidajanugemevaruka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e07a99b5-2c32-47ff-9b58-5796f8937565/reality_transurfing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8d98699-cd33-4043-a854-b0a507100315/50442535808.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38041b83-3bdd-4a29-9bd5-297b282b0136/the_four_spiritual_laws_of_prosperity_audiobook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a49d6b53-8cc8-4780-bbae-d2a83c3e3a21/xerox_workcentre_3325_toner_cartridge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/963735d8-6b21-4f59-a9eb-cbfdbec4d0dd/nicomachean_ethics_book_8_chapter_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68462772-7c05-48a2-b5bd-840f561515da/hana_wa_saku_ka_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6207e71-d7ed-4bfe-a67e-bdd794fb087f/how_to_use_ps3_controller_on_steam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98edfbbb-16b1-4997-a62b-77e5c9c5c8b2/psalm_23_bible_study.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ac42520-fcfb-4cad-ada3-ef41c68a80ba/32575949285.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11e78232-c3cc-425a-ba72-4662308690dd/budozixowigi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4240f5f8-eaba-44c1-95d9-916cc5713977/printhead_problem_hp_officejet_pro_8600_plus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ff25678-b4bc-4115-ac70-faa6c310f1da/73677408115.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_off0000f2c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C6 5272 bytes
SHA-256: f993e8ed11fcdb13f8fd6587f8dc5a3f362046252e7533470d89f412ce2e8063
font_01_sfnt_off000104a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A6 10808 bytes
SHA-256: ab1ec07587f88a7c5a7102b8d97c84a0970f06a01516c18aff64bb0379304e43

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