Malicious PDF — malware analysis report

Static analysis result for SHA-256 838ae79498e01f48…

MALICIOUS

PDF

84.8 KB Created: 2021-05-26 10:57:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4afb37004d94b0dc150b15945cceeeeb SHA-1: 9f8a7de531ecb950580adde6b8bf7692dc6a95fd SHA-256: 838ae79498e01f481d3e7108f7e76b72f9563aa33f73098f841a19f19fd77c7d
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/strik?utm_term=kung+di+rin+lang+ikaw+piano+sheet+music PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0611afa0-2770-4944-a1eb-26fc584b6c02/mazataroserire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/031c5a05-2b56-41f8-a3e8-78460eea6eb1/12914287221.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e80f6284-5e70-462e-9834-97f7489a0acf/57969929018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b25f3b05-4f72-4373-aa77-b631b710f611/fafowawekozefidajeruwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39aca8d2-df15-4cd8-bcbb-e7324de49c16/windows_7_to_10_free_upgrade_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/42023083338.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00a0f58a-35a6-4622-b3e1-c8b0e9ea1595/zaxupix.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/78021502492.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/funny_baby_crying_sound.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d44f47e-12da-4d49-910a-673ef26cc77d/woduvesoginujapedugiwowas.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/garmin_gpsmap_64_sd_card_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15d3186b-ed51-4527-8ab3-a770c9ea7bf2/tovedix.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/77645402824.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/offline_blackjack_game_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11858279-0d2f-4a87-842a-1f4fc4758f54/fuzomabulepuwuv.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/2008_jeep_jk_sahara_stock_tire_size.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/square_one_menu.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/icharger_406_duo_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/049bdfda-61c5-4ecc-ab78-183bf0cae30b/83081348718.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_off0001091d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1091D 5612 bytes
SHA-256: e814e1b3cf0051bf3043e902e2d5eab4bd0d958323fe9fceb5ddb3aa07e05757
font_01_sfnt_off00011c24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C24 11820 bytes
SHA-256: cccf5a368bec146a5ae7633ee312c9f8f885c8b4efd26026c861f924cb237916

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