Malicious PDF — malware analysis report

Static analysis result for SHA-256 efbe9d7396ed0d9e…

MALICIOUS

PDF

74.5 KB Created: 2020-11-12 23:41:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b90741bdcefe277da2b892578976fbd7 SHA-1: 5c1c3827854dff100bb0cce22998f2b396cb104b SHA-256: efbe9d7396ed0d9ec43a9baa42fd93247fe3890956ead79a0e10591e888f2d3c
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. 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 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://trafficel.ru/strik?utm_term=active+directory+design+document PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/damerirazib/58563586933.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52337319-f80b-4be9-a485-7d521a638dda/lonivazanesumujafoxafil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df65d904-cd75-41f9-ae93-a62c00f4fd1d/88914299593.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d23ad1d4-51e8-46a7-ba1c-821183af9043/que_son_los_helechos_resumen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc1f58d0-3cc6-4404-a420-2ac0437149e2/ritomedisakifuta.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/94673928035.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9f8be69-68c5-4fd5-9cc9-f3619a67df65/60474769753.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb8e87b1-0234-4c04-b4ad-6565cfe1b85c/molabutuno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd18d7de-c28b-4dfc-adff-51c31d985308/death_wish_meaning_in_malayalam.pdfIn PDF document text
    • https://s3.amazonaws.com/tifemuma/kipadewozeguxaxukufemi.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/8032638457.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/36901135749.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/nirowoxodasawuj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB3 5048 bytes
SHA-256: c502ddb611c3bc96bf99400a963fd670ed365de6e7e5759ece84f30f977564f4
font_01_sfnt_off0000ebcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCB 10232 bytes
SHA-256: b627bebe94fcf68f34d4358bb2ecfd951b165549203b2620cf5cd71414104416
font_02_sfnt_off00010e98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E98 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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