Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca2e76420a84efaa…

MALICIOUS

PDF

115.0 KB Created: 2020-11-22 19:17:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f6a893855ead25c67b3f787d945e17d2 SHA-1: de4fdc5954e67a92f2a9e9c6c77554dd241e3e35 SHA-256: ca2e76420a84efaa5b8f9bc5878c8f2a513cb6b0cf02fffd2fdc53166253b2ab
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 0.9998

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://traffnew.ru/123?utm_term=living+things+and+the+environment+answer+key PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369786/normal_5f89c215682bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459185/normal_5fac2f07bba0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409811/normal_5fb5c3193699c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369901/normal_5f88794d3ddb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368492/normal_5fa72394c508a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369509/normal_5f8c1e0737ae9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393632/normal_5f90cf8e3561d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405437/normal_5f92381379717.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/zupenafud/linear_guide_flange_block.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/347fa757-4219-4988-97d0-47ef65cb2a66/57417970343.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fefedbe6-a7d2-4849-8a74-7112e5156dc6/rowozazapetuguzaroriza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8d489b5-8787-4cdc-8ee5-0d231f43b9f1/43492807053.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/813fb04f-1fc0-469a-8ebf-3c542e4c091f/28719580164.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/79587505378.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_off00018906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18906 5464 bytes
SHA-256: a45553c79ac2cd4d4ad39b4a84550c465145e6e41f3c0105fa10c35c8f9f8a1b
font_01_sfnt_off00019b93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19B93 10276 bytes
SHA-256: bb1a02e0ce3c997dc72c96b8dd69803b067701bdbbc79bdcb7bc09550d901be2

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