Malicious PDF — malware analysis report

Static analysis result for SHA-256 2679f411b3b9a7b8…

MALICIOUS

PDF

80.0 KB Created: 2021-03-10 23:40:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 541ce817f9d4ace8ea0cdae7448fd33a SHA-1: e51f87ae508225ac9034b9b259eec322aa4912bf SHA-256: 2679f411b3b9a7b80d0c711db1ee90e6d119d88d455871212a337924080c6304
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, specifically identified as 'Pdf.Phishing.Trojan'. It contains an embedded URI pointing to a URL that offers an APK download, suggesting a phishing attempt to trick users into downloading malware. The document body, though heavily obfuscated, contains references to 'ant hal service.apk download' and the authoring application 'wkhtmltopdf', reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wix?keyword=ant+hal+service.apk+download PDF link annotation
    • https://cdn.sqhk.co/suxunuke/fkMghxZ/shooting_target_stands_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/molavagew/heHfNig/chameleon_imei_changer_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/denirinodo/Tig7hfF/mepufe.pdfIn PDF document text
    • http://fixokalofofe.iblogger.org/how_to_clean_burnt_farberware_pot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485442/normal_6018a25045258.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487431/normal_6046278715106.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/hHdEc6f/40985797409.pdfIn PDF document text
    • https://cdn.sqhk.co/kivuwutu/jahgjdx/74042435563.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408587/normal_60208a49db799.pdfIn PDF document text
    • http://bolagafub.iblogger.org/bell_s_palsy_treatment.pdfIn PDF document text
    • https://cdn.sqhk.co/zibepidok/eqPd7HK/36179908557.pdfIn PDF document text
    • https://cdn.sqhk.co/jiluputumusi/Ticgisw/goat_simulator_mmo_simulator_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/rojisixel/haw2hfo/eamcet_allotment_order_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/fafojipedul/ihjjggd/36792660702.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/44c84d33-8f24-480b-98a4-43c27484f550/18810221271.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a5279c0-d584-48ad-b0e9-b6b808179fae/72701477280.pdfIn PDF document text
    • http://podedubo.epizy.com/95775053987.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2d5a209-d69b-471a-8bf6-c7f1c278e6ad/19582033929.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ac97fac-6529-4a0d-9c58-d245d60129d0/34348111285.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DB 5400 bytes
SHA-256: 4851e0d30dfaaa20f1bd90405c9060e27592ed76f724af5a3cb413525164a262
font_01_sfnt_off0000f949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF949 10184 bytes
SHA-256: 58964dc4ff38f6f460f468795945cf938a2903577108ce6d2b37376008261768
font_02_sfnt_off00011c6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C6D 16088 bytes
SHA-256: 6fded02eca0f92369f39543261631dc0570ae7f1b5bcb2281e5b286133732c81

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