Malicious PDF — malware analysis report

Static analysis result for SHA-256 aedf3990d4313dc9…

MALICIOUS

PDF

80.4 KB Created: 2021-04-04 13:56:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c97c0c9920beb5fa1d2b05355eec7c1 SHA-1: b0af4f7cb6174c9bb9010256bc61cd8d04f3ec57 SHA-256: aedf3990d4313dc9d01eba27a690897a0206a860a6fdba063bf80fc650ebd577
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that leads to a domain associated with malicious activity. The document body, though heavily obfuscated, appears to be a lure related to tourist information, likely to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ponafet.ru/award?keyword=mapa+de+buenos+aires+com+pontos+tur%25C3%25ADsticos+pdf
    • https://cdn-cms.f-static.net/uploads/4366401/normal_60673cbd378a4.pdf
    • http://pimifawimonidij.mywebcommunity.org/rajitavofanasuvixopaw.pdf
    • http://fivogudog.iblogger.org/wadaxuja.pdf
    • http://fudazozotakaxal.mywebcommunity.org/shia_islamic_books_free_download_in_urdu.pdf
    • http://gavediteriremuv.medianewsonline.com/price_kx_tg3411.pdf
    • https://cdn-cms.f-static.net/uploads/4368221/normal_6055be0f19427.pdf
    • https://cdn-cms.f-static.net/uploads/4380545/normal_603efee9123c5.pdf
    • http://xoxuvajes.mywebcommunity.org/75319097261.pdf
    • https://cdn-cms.f-static.net/uploads/4425514/normal_604012debb3e3.pdf
    • http://pifovabu.getenjoyment.net/59780891296.pdf
    • http://nijaxubazaziw.mypressonline.com/converting_kindle_books_to_mac.pdf
    • https://static.s123-cdn-static.com/uploads/4418175/normal_600315eca31cb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/97edc95b-b42a-412a-b444-36860e8df056/what_is_the_relevance_of_technical_writing_in_the_business_world.pdf
    • https://uploads.strikinglycdn.com/files/fd6db71e-2555-4bc4-bc95-8c075ec6d068/7040519376.pdf
    • http://kofaxafogi.myartsonline.com/sub_zero_fridge_repair_nyc.pdf
    • http://bikikifuxax.epizy.com/89746542757.pdf
    • http://kaxixuzebupajal.epizy.com/asrock_z370_pro4_manual.pdf
    • https://s3.amazonaws.com/xeroguru/podaxapixigabubibaxefibi.pdf
    • https://s3.amazonaws.com/paxunu/funza_lushaka_bursary_2020_application_form.pdf
    • https://uploads.strikinglycdn.com/files/40d929b5-a98e-4d33-abfb-3ee5001a2994/98725588144.pdf
    • https://s3.amazonaws.com/degisapemifa/damumazow.pdf
    • http://mojebevusawibo.rf.gd/frayer_model_template_for_kindergarten.pdf
    • https://s3.amazonaws.com/xijilesuzuxo/blank_sheet_music.pdf
    • https://s3.amazonaws.com/defujo/putamen_and_lentiform_nucleus.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f803.bin
5f0488d24b5e5a6a29300bb4e32a43e6cfff1eb57460b37f01930cc16d216a92		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF803 5468 bytes
font_01_sfnt_off00010a91.bin
95879ab3cb6d465458748a04967a080c552e2d593ce9cb046a790445fba42e1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A91 12772 bytes

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