Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdeca159b1689969…

MALICIOUS

PDF

77.0 KB Created: 2021-02-20 23:01:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 049216052cdedbacf2c46b6881de47c6 SHA-1: d39c428af8fbf7370ea8e1c367145e6adcaa20ea SHA-256: fdeca159b16899695f9c34c20096e2a12ef978e74c7dbdc39d3e95c2701a4cab
96 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ClamAV as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely used to deliver a malicious payload or conduct phishing. The document body appears to be obfuscated or corrupted, but the presence of the external URI and the ML classification strongly suggest a malicious intent to redirect users to a harmful site.

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://seumenha.ru/123?utm_term=m-audio+firewire+410+4-in+%252F+10-out+firewire+mobile+recording+interface PDF link annotation
    • http://gonaxepafa.iblogger.org/working_at_mcdonalds_situational_judgement_test_answers.pdfIn PDF document text
    • http://reactivaperu-2020.com/975460204647l3dk.pdfIn PDF document text
    • http://fabermanufacture.ru/advena_apk_freeerfgb.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/matogapibelifiv/gagagozixanub.pdfIn PDF document text
    • http://gotikomerutoj.rf.gd/hp_designjet_500_drivers_for_windows_10_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/lupisutevixusaxet.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/78995695205.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/54770748607.pdfIn PDF document text
    • http://wekameti.rf.gd/fisafabo.pdfIn PDF document text
    • http://lefabeku.epizy.com/how_to_relight_a_bradford_white_water_heater.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/website_to_level_guided_reading_books.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/citizenship_test_answers_in_spanish.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/template_builder_online.pdfIn PDF document text
    • http://wewimolu.epizy.com/75820285367.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/77183620853.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_off0000dc59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC59 5632 bytes
SHA-256: 8f7d02ee84dcd5e989632936b1cf82f911512fa2c72403c2eb65b3e5475be7f2
font_01_sfnt_off0000ef94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF94 11320 bytes
SHA-256: e686cb95904df1cee8f44fc6fd4cd9d90dba8c3efde9bfbc19f7ef5d1e6b8567
font_02_sfnt_off00011649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11649 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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