Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfcb4cf1c928e345…

MALICIOUS

PDF

70.7 KB Created: 2020-11-23 14:13:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9fece4bbf71f9669f81903e35a04df3b SHA-1: 90b5c1659538365ed6b30ec87a7382e1b9ff191f SHA-256: dfcb4cf1c928e345dbce34f9189840862c3b67385fcbce382683d1c8ea5d7e71
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document flagged as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'https://trafftec.ru/123?utm_term=poema+para+mi+novia+hermosa', which is a strong indicator of a phishing or malware distribution attempt. The document body is heavily obfuscated, but the presence of the external URI is the primary driver for the attack pattern.

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://trafftec.ru/123?utm_term=poema+para+mi+novia+hermosa PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375889/normal_5f8ba99c0a5ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420434/normal_5f9aaac65a5d3.pdfIn PDF document text
    • https://zopofaxomape.weebly.com/uploads/1/3/4/3/134372760/b3c994aa8e9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379498/normal_5fa23566331e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496153/normal_5fb736cd49157.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368742/normal_5fb27ff636f6e.pdfIn PDF document text
    • https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/5977359.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/503661e6-94fe-4570-b1de-c1ec860d665a/pewurokazosademile.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/verbal_bullying_in_school.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/1412464276.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/apertura_piriformis_maxillae.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/kexufovoxagarexukeparu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27c0e128-c7a9-4004-900c-dc7f0e7d9fab/gavoxofolufirekilojetaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dc721f9-c719-49c0-8e6c-600e3670bf7d/how_to_set_home_in_minecraft_command.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/james_monroe_elementary_bermuda_dunes_calendar.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_off0000d8c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C6 5088 bytes
SHA-256: 574883806c0da44855dc1102e44a8591b8571897df4a9b88017e417114e0e18c
font_01_sfnt_off0000e9ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EA 10584 bytes
SHA-256: 298d8f4c27014e4132b4c5411a857885ce9f87b16f9f630f393cb6a89a2ab594

Open this report in the interactive analyzer, or submit your own file for analysis.