Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2eb5aac83b38875…

MALICIOUS

PDF

138.8 KB Created: 2021-03-15 22:24:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 65bd384afb6d9506915619fd3e13c616 SHA-1: eab1d3eb4b0e6f92fc6663a50901a48ae0e7c22a SHA-256: a2eb5aac83b38875e52c36fb73303d5f32c03bef0dcb72c8117e9ba7f75c0ac8
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document contains embedded URLs and heuristics indicating it's designed to trick users into downloading files, likely by impersonating software drivers. The presence of a 'password-protected archive' lure suggests a common technique to bypass security filters by encrypting the malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dugedepap.ru/strik?utm_term=dell+latitude+e5400+display+drivers+for+windows+10 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4387806/normal_5fcff5faf2d19.pdfIn PDF document text
    • http://kasaxeko.mypressonline.com/labour_contract_uae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393361/normal_5fd7b79a48c23.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383467/normal_5fe4f0ae53b42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448347/normal_6046e798a8683.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464056/normal_5fd097e97e82c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369911/normal_603e78e0f21f7.pdfIn PDF document text
    • http://yoga-fitness.space/ates_ve_su_6uojqy.pdfIn PDF document text
    • http://masito.space/how_to_create_a_position_vs_time_graph_from_a_velocity_vs_time_graphrqemi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420906/normal_6005835e411cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464302/normal_5ffae660a89f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503279/normal_603343b39a0fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369324/normal_6003252bdb7c8.pdfIn PDF document text
    • http://rexevivejegox.scienceontheweb.net/estadistica_descriptiva_libro.pdfIn PDF document text
    • http://xevusezes.medianewsonline.com/86853796847.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413016/normal_5fd2602a76bce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417329/normal_5fcf481222bc2.pdfIn PDF document text
    • http://duzusedolatepe.mypressonline.com/war_of_the_worlds_full_movie_in_tamil_free_download_480p.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zaduzos.myartsonline.com/57563382213.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_off0001e0e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E0E5 5696 bytes
SHA-256: 2ad8f71bdeedd5e7a10ae95d90f84849c52c02ab2ed218b37816567e3e9863bf
font_01_sfnt_off0001f48b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F48B 12424 bytes
SHA-256: 5b7a543f4d0bf52b9d19d06a48f50781ab43e2b95b428c5c908962daa0216e09

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