Malicious PDF — malware analysis report

Static analysis result for SHA-256 76446276f852ea80…

MALICIOUS

PDF

104.3 KB Created: 2021-05-29 06:51:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: cb3770d0a6242126c173dfdc71a0eaa2 SHA-1: 2d9bebfd67f4959052d27d064e9ded5979517ed5 SHA-256: 76446276f852ea80aa44282b3eb3940c7a4af991a668b63f9512b0e2019c459f
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 0.9986

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://dafemum.ru/123?utm_term=circuit+maker+student+version PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4456166/normal_602aa4a681de7.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4494165/normal_60aff607eea40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402507/normal_6018644526d47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483833/normal_602b29c655673.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453334/normal_603e7962bc711.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459055/normal_5fd65c37b1642.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448744/normal_604b5495dafb8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402936/normal_5fca136ac1859.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492575/normal_6057953f6143f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407070/normal_5fffad2e9b73a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501046/normal_60369560e468f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500692/normal_5fe9852de2ff0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453741/normal_5fd682a4ee1b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382965/normal_60058315bf8f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410191/normal_5fe62136e4aee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472773/normal_605f6aac787e1.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/06307468-c067-4f2d-aadb-3ef25ec204de/omen_of_the_stars_book_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f4abbe8-3cb3-4c73-8ecf-4a4aacf44264/70471167846.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51d21935-b7a2-42a0-87cc-7b385d223ada/why_is_my_hot_water_heater_relief_valve_leaking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffe294e9-0ce3-4480-b467-77a6382729af/98808351632.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72e6fa0f-5a0c-464b-8e5a-6f39be006a05/42098244728.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88f5b78d-7ffc-4f60-8f3d-f89f4c40d005/juwemakapebibelofaxax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e53cd8b-4d28-465f-b6fa-17872c8c4c14/after_book_4_summary.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001657a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1657A 24396 bytes
SHA-256: 69d40bc6688d98a3466d0c10e4c9de4998355b072aaeaf467ed01f10ef66cdde
font_00_sfnt_off0001280f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1280F 5080 bytes
SHA-256: 2d55684c5ac622d1742a28f434c7c12740adb0998b2039d82c6503a62d246b65
font_01_sfnt_off0001393f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1393F 13504 bytes
SHA-256: da084538fab3cb16e54f3dcac8f5df5e9692b8076c6a8fd74387b910f522798f

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