Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea459f92fa1e17c6…

MALICIOUS

PDF

92.2 KB Created: 2021-03-14 09:23:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a90dab366d06105f927750c3bded25fc SHA-1: 9d1c74303bb10e5d8e6d2c53a7adac64aff4fc02 SHA-256: ea459f92fa1e17c6b3893e39ecd7f4bf37dab811d84505afe35f8ed58fb5ff73
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 0.9997

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://fokemale.ru/award?keyword=mathematics+formula+for+class+12+cbse+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4471240/normal_601ac122c4b92.pdfIn PDF document text
    • https://cdn.sqhk.co/pujazojiwixi/gqshhjd/game_maker_studio_2_download_crackeado_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485576/normal_5fe79eb60b65e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419623/normal_6006633b0f252.pdfIn PDF document text
    • http://gutibefatidag.medianewsonline.com/dadazutekotatudefepitikam.pdfIn PDF document text
    • https://cdn.sqhk.co/xakurusuk/kGiggca/30922366541.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/a6a2db46-cb03-4132-9494-aa2ac7cdda5e/chi_health_lakeside_clinic.pdfIn PDF document text
    • https://198d5876-2e36-4a54-a59d-b4c1060b65be.filesusr.com/ugd/4733ca_a188f3a21e124333a73cd99464396b27.pdf?index=trueIn PDF document text
    • https://9d76d0c6-5807-43ac-a2ba-7b4112d1a20a.filesusr.com/ugd/5cd33b_dcbc375b0a7e478cbd74b8c8e77de833.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/foneniz/70520524673.pdfIn PDF document text
    • http://romapubimowa.onlinewebshop.net/56970289394.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4d6f856-f397-421a-a058-ada11efaf741/sing_emmanuel_hymn_book_old_apostolic.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/18683008972.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/totitixowivagoxixit.pdfIn PDF document text
    • https://c788b29d-df2d-4d46-9946-349e8cce89b7.filesusr.com/ugd/a9e086_2056179f50a349f18af04dbf8e9debe1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/batak_sculpture.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/usda_appraisal_form_1004.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e21eb7bb-0285-4685-88d1-86f65844060c/6978211435.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c92b0e4d-9658-4a0d-8c53-38f9f895c730/jutemopanuxoruvoxoveves.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E61 5724 bytes
SHA-256: cdf6a26ae96e046593939b5a358d1ef8d7536f2aa9055e3b02040efacc6e0016
font_01_sfnt_off000121be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121BE 12356 bytes
SHA-256: b4167a73f31247325369337e271cdfccb1c53f231730125940bd7142ad8dfc50
font_02_sfnt_off00014c47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C47 16412 bytes
SHA-256: 2376fa866d9e36706e956d2c043025bf1ce37211d3643bfc3f3d21098dd543f8

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