Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2d24e2dda5adc3f…

MALICIOUS

PDF

76.9 KB Created: 2021-03-20 03:49:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 4d15e587a5062ad9976b27ddf092d164 SHA-1: 4630d9f73b5fdc60ea59f20269f4e80965c977f8 SHA-256: b2d24e2dda5adc3f0ad4e1305d953e5837f891c8d7c60ab56b0ba04eb8d5e02f
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a critical heuristic firing for ClamAV detection. An external URI pointing to 'zajinet.ru' was extracted, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and the presence of an external URL indicate a likely attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://zajinet.ru/award?keyword=bwwm+books+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368746/normal_60297f942f531.pdfIn PDF document text
    • https://cdn.sqhk.co/xufojidaju/eBVjcih/time_weather_widget_app_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449184/normal_5fd9c7f373f63.pdfIn PDF document text
    • https://cdn.sqhk.co/wabogoga/WiBTgdR/85339338860.pdfIn PDF document text
    • http://visionnew.xyz/dremel_400_xpr_reviewiq05m.pdfIn PDF document text
    • https://cdn.sqhk.co/xavipinav/ig3BTic/80374276192.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464539/normal_6022c3063c750.pdfIn PDF document text
    • http://zavarivaemvmeste.ru/90162511057ieg1q.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/how_to_pair_plantronics_bluetooth_earpiece_with_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/037698de-2474-4591-975d-1318b5733fd4/fisher_wood_stove_mama_bear.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a31fd1b-5cf0-4ef2-b00f-c84ffdef6ce0/whats_in_a_chalupa_box_at_taco_bell.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e322c83f-16df-455c-a5fd-8211d9335f33/95401645830.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e9a5226-8ef2-433b-83ae-c71c79d7ee99/how_to_become_a_medical_imaging_nurse.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/82763326204.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/85312835662.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b556c2e2-ca63-40a5-8d72-2d5ad273d11e/89908469808.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/83407415194.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7caf730-1e60-4a75-9344-ae6825acf1e7/98565695332.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/143bc2a4-beeb-4abf-8148-abc4714cc6fb/aquasource_shower_faucet_leaking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fe9cbe2-c47f-45e6-b331-4886b23be541/new_yorker_hotel_nyc_location.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/salesforce_admin_certification_questions_and_answers_2017.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_off0000e658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE658 5196 bytes
SHA-256: dcc196f0e1570eb343d30d2bbd8cb8fbf109233027109b033d2c1468dcf3db1f
font_01_sfnt_off0000f801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF801 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off0001008f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1008F 10532 bytes
SHA-256: e37f9a3fd6ea280eecc32b95e9f524c6ec9f6aa4c0bbcf0163006eb7241df2b0

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