Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c142b3ed895e083…

MALICIOUS

PDF

81.7 KB Created: 2021-01-31 07:44:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6d1bd9fd4ffca340959449a4cec25647 SHA-1: 57669034c44a7770c31578f291a889c7783c3963 SHA-256: 5c142b3ed895e0839554779f9a57d65c287867b6b5d9ac3236fef9984ab0651b
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL that masquerades as a restaurant menu template, likely intended to trick users into clicking it. No scripts were extracted, but the presence of an external URI and the ML/ClamAV detections strongly indicate a phishing attempt.

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/aws?utm_term=french+restaurant+menu+template PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408009/normal_600caf68796fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469634/normal_5ff55bde7b341.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/gikogekapudazibuvejuj.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/friendship_day_images_for_whatsapp_dp.pdfIn PDF document text
    • http://ladisopezaxak.epizy.com/muburuzepigekove.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/laptop_boat_race_game.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/elgar_nimrod_music_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/nunuv.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/mepexurakubisiniwuni.pdfIn PDF document text
    • http://zorogeloma.epizy.com/tukevitu.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/network_android_library.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/evaluating_numerical_expressions_worksheets_6th_grade.pdfIn PDF document text
    • http://rasezufolob.rf.gd/suwuleri.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/49147158452.pdfIn PDF document text
    • http://fukefuxatolu.epizy.com/lapodixuretutebozurusukiv.pdfIn PDF document text
    • http://tupanukaxigazit.epizy.com/55654871920.pdfIn PDF document text
    • http://wajalapivibobi.epizy.com/l298_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/attacking_faulty_reasoning.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f63d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63D 4852 bytes
SHA-256: c134682590794eebe9a0cefca7f5d56334a47b60efdfbd57527d641a4f7c3ae8
font_01_sfnt_off00010681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10681 10844 bytes
SHA-256: 4240ec98cc562c6d1efbfbdaca4fb89dc6d340610cfe2dcb0cb2d2a87cfe533a
font_02_sfnt_off00012b58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B58 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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