Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cba6a921d0da6ca…

MALICIOUS

PDF

69.2 KB Created: 2020-11-14 11:31:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2122d46a5d06b49fbea55102f9f1f85b SHA-1: b52240fb18afafe16ed2b6261e6a9a3e7a495e94 SHA-256: 0cba6a921d0da6ca0cd2851aa1e552131d28c5a2f970f14144753bef7d3b557d
156 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 file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many pointing to PDFs, suggesting a link farm or SEO abuse tactic. One of the primary external URIs observed is 'https://trafftec.ru/123?utm_term=duas+for+tooth+pain', which likely serves as a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafftec.ru/123?utm_term=duas+for+tooth+pain PDF link annotation
    • https://waxojokizubow.weebly.com/uploads/1/3/4/4/134482073/3095168.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401712/normal_5fa18371dd954.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385410/normal_5fad8a1e20939.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/nonipesikiri/57895112276.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e4c439f-335c-4c45-bf71-559dc113b5eb/manual_transfer_switch_with_50_amp_inlet_for_generator_connection.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/58999576412.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/651a8778-607c-4a33-8ccf-a544a1e05342/gotonipiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35d61e57-80b3-4b76-b5a5-4c2444527094/nodag.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/siklus_akuntansi_perusahaan_dagang.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c2b2f61-45f8-47cc-ab10-403b3c726819/cattle_and_creek_sheridan_wy.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/447069097.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/kaxeloruvedikabulonenudi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7848f04-bfba-463c-a7a6-e4ec97b79c40/icamera_pro_apk.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_off0000d2f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F5 4956 bytes
SHA-256: b269ea8f5e9616092ed8c041f9de4b8d6c83e9be5175218f855f3299169dfce3
font_01_sfnt_off0000e3d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D5 10508 bytes
SHA-256: 8dbfb40f38d876ee5bdbe83af88f839af3ad43673017926ba26387a6b69ffec9

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