Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc406bb10838ce32…

MALICIOUS

PDF

78.2 KB Created: 2021-05-22 03:42:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e7c5359ae6ffa9e31bd182365f36e137 SHA-1: ad60e29cb74651a9a0427b12174af273f7c20728 SHA-256: dc406bb10838ce32b35ec17cdc3b34b02da6489e65b140fc5d441177763fbb60
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/strik?utm_term=restriction+enzyme+worksheet+high+school PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405197/normal_600e75eb54ba7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384628/normal_60563ff94f0f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453754/normal_5fdacca162b06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417527/normal_6060bbcd68413.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413735/normal_5fcb9cfd32314.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370533/normal_5fe184fecca89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479235/normal_6011ed5bc19f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485578/normal_6041e8660a244.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465907/normal_6023ed8614b0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370317/normal_601029ecdeb73.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455914/normal_60011589bb901.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379733/normal_601c7b60c7355.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489056/normal_606c850f5df52.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/865b25f8-2d0d-4035-9b84-2f3dea54f286/braun_series_7_shaver_790cc-4.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/unshakeable_tony_robbins_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0336bc39-1cab-4259-8f3c-07a86bdb70b2/31307342964.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/audacity_2._3._2_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/kivakulaz.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/blender_grease_pencil_animation_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/48934213079.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa8f1e12-6f15-44e6-b597-5a6107cf4dfe/how_to_create_template_word_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/sunday_express_magazine_prize_crossword_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/nulunabuwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35baa01a-43de-49a9-8eb7-65f496079ef6/why_is_my_service_light_red_on_my_att_modem.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_off0000f2fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FC 5316 bytes
SHA-256: 2f27a87270f27ad37bd28cf5155c9cf2e2731870be742714c79ed4408964bbe5
font_01_sfnt_off00010510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10510 10912 bytes
SHA-256: c80b6e91a23fc660324e82d1cd71e2d89613aa1df4e779cf2c85f37173ba9ded

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