Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe727df3786ffa2a…

MALICIOUS

PDF

107.6 KB Created: 2021-03-31 03:35:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e43d17e39e2a36e53e19a907f97089b3 SHA-1: 26b6af35eae01447a2cbc4d4e3589ebbe20d0cf3 SHA-256: fe727df3786ffa2a192f81980108330e61bb4e3a38d9e0531f87627c2051b833
136 Risk Score

Malware Insights

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

The sample was identified as malicious by a machine learning classifier and ClamAV, with heuristics indicating it is an advance-fee scam lure. The document body, though heavily obfuscated, contains keywords related to agreements and legal documents, reinforcing the scam pretext. Numerous URLs were extracted, suggesting the document is designed to redirect the user to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://druttle.ru/award?keyword=syntec+collective+bargaining+agreement+pdf
    • http://begdas.space/gofokuzolise07kzw.pdf
    • https://cdn.sqhk.co/wipabamof/4ghiaGZ/tudinenobuj.pdf
    • http://mx50off.pro/2572723350bpebh.pdf
    • http://mnatural.space/40531978901r0hxh.pdf
    • https://static.s123-cdn-static.com/uploads/4494673/normal_5fff091caa4a5.pdf
    • http://liolika-rsya.ru/530889399139x0jf.pdf
    • http://spain50off.info/angle_worksheets_grade_66m5ar.pdf
    • http://the-job.ru/feral_tiefling_traitsc5oid.pdf
    • http://look-hotel.com/9466658191g2e1t.pdf
    • https://cdn-cms.f-static.net/uploads/4454435/normal_605f46a728f3f.pdf
    • https://cdn-cms.f-static.net/uploads/4448540/normal_6053bf48728c2.pdf
    • https://cdn.sqhk.co/rufopunuk/geLievq/bruno_mars_marry_you_sheet_music_free.pdf
    • https://cdn.sqhk.co/batumozi/Yyicihg/autonics_panel_meter.pdf
    • http://idealslim-ordina.site/texas_defensive_driving_answers_2019k1t0j.pdf
    • http://naturwows.space/law_of_conservation_of_mass_lab_reportkoh76.pdf
    • https://cdn.sqhk.co/bigulikexupa/h1Gigjg/69404571109.pdf
    • https://cdn.sqhk.co/zikufojigox/yjdfjhU/war_of_conquest_definition.pdf
    • http://muldwych.com/how_to_share_a_page_url_on_whatsapp_that_directly_open_the_facebook_appb57oq.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c6797f09-aafd-4167-9419-3a0e5d9d15ed/80287069087.pdf
    • https://uploads.strikinglycdn.com/files/3f871e6a-d8b3-4b67-a1f1-541186ddc57d/how_to_open_bose_wave_radio_cd.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_off000166a2.bin
792f8f72ec78c95d6abb75805e35e67e493ec6010d386c9081d1ee1343f54807
pdf-font-stream PDF embedded font (sfnt) at offset 0x166A2 5704 bytes
font_01_sfnt_off00017a0b.bin
ca5fa7b2fbafd5a602e295cc4ebba8a0b9ed94163c426dae169fcd4b94ef3b7e
pdf-font-stream PDF embedded font (sfnt) at offset 0x17A0B 11904 bytes