Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef18f852e410378f…

MALICIOUS

PDF

153.5 KB Created: 2021-02-15 10:51:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7caf6091103953637bcaac534b5d04d8 SHA-1: e731203fffbfd8efee02c960de4ee702b4e82496 SHA-256: ef18f852e410378f9bc97fb877f4d92ef7f97e4b8d2ce17aaad5d4d2b2138db1
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 0.9987

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://leonvi.ru/wix?keyword=genki+workbook+1+answers PDF link annotation
    • http://jotepuxigavof.iblogger.org/wofitufa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450506/normal_5fc77314bef7c.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/ojaXgjO/pixerukomipubobul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386084/normal_5fc620e02525d.pdfIn PDF document text
    • https://cdn.sqhk.co/xutazazo/glsArf7/download_windows_10_file_manager_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/beledufe/hjcvuTr/word_family_room_decor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424645/normal_5ff31950796ac.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/ibeheha/nanasaparotupaginizobibed.pdfIn PDF document text
    • https://cdn.sqhk.co/wirubetena/eijghif/cut_and_repair_rope_trick.pdfIn PDF document text
    • http://momezalomakejo.22web.org/63169181997.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/sukugokodef.pdfIn PDF document text
    • http://pomezup.epizy.com/32873716912.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/32468367160.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD4 2984 bytes
SHA-256: dab582e19a79dfbc1e99bd06a85c3fd08aa1a82f53b15f9dab353261877155b9
font_01_sfnt_off0001090d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090D 94992 bytes
SHA-256: 2276d0e33db4e2b437deb29fc57cbf307a1a8369beb46d64794a42ee515928e9
font_02_sfnt_off00022380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22380 5024 bytes
SHA-256: 68f000d91289d3d5c839ae1958b368995569ea2941c4f50166c56fde12e111a5
font_03_sfnt_off000234c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x234C3 10436 bytes
SHA-256: df2e8271b91e38a1883fc3ffd0c5b2084ade63553061ae87bf55e296fdcc296c

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