Malicious PDF — malware analysis report

Static analysis result for SHA-256 62baa0c8493539f9…

MALICIOUS

PDF

71.2 KB Created: 2021-04-01 01:32:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: b8bfa9b834b663b80cfa82f012b933fe SHA-1: a992631603011bf87d9183c3e3f6e6bac9b8650b SHA-256: 62baa0c8493539f982ccf2fde51e002b5348bf10d56a82ad82592273a3cd0057
116 Risk Score

Malware Insights

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

The PDF document contains an embedded URL that leads to a suspicious domain, identified by ClamAV as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to a smart watch manual. The presence of an external URI and the ML classifier's high confidence score indicate a malicious intent to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://golowaki.ru/wix?keyword=gzdl+bluetooth+smart+watch+dz09+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480905/normal_60157dbdc9a5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445750/normal_6062179aae8f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460076/normal_600de56b2151f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408853/normal_6051820b6e5de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408875/normal_60176c6d25e01.pdfIn PDF document text
    • http://xuvaguwanolinu.66ghz.com/capital_expenditure_policy_template.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/8dccfd9a-76f4-496e-82ce-b621baaa3f98/redipima.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/51901086472.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44771a3f-d38d-4d02-9be6-60adba7905b6/ge_electric_dryer_timer_wiring_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27609875-59bc-4306-a232-8d60c14d7526/48385315652.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd38cea9-06a4-450e-a0e1-3739d7ff9a76/cuanto_son_150_mililitros_en_onzas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2e4416a-cfdc-4e0a-b445-bd635e443b8f/nike_air_force_1_low_platform_womens.pdfIn PDF document text
    • http://zalolod.epizy.com/low_carbon_steel_properties.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd7e4eec-de06-4ce1-bf32-55110a75f138/apc_smart-ups_1500va_lcd_230v_with_smartconnect_smt1500ic.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/fetovopopovofoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b0f1e8c-ca7e-4d81-ae1b-346a2bbd9e59/84948661870.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/168c6f5c-7570-4be4-817c-f756c9e40d62/50497671010.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/fun_questions_and_answers_for_whatsapp.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_off0000d7ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AC 5788 bytes
SHA-256: b115c6ba91c073f0b39afa7eb89a41d983613237da5da9937ef62d66b5021e67
font_01_sfnt_off0000eb47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB47 10720 bytes
SHA-256: 06b9010ee3039ba05f8e75cbb19a420c31c69825109cf139e020def550cbb850

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