Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8c346e4d36e4dac…

MALICIOUS

PDF

69.2 KB Created: 2020-12-19 12:47:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: de3c222eb2f05015bc6a3ca0d467900b SHA-1: e1636a7b1b0b9645a79c1b5b9562bf842a3ceee0 SHA-256: e8c346e4d36e4dac05298424b07bb630b142e746015d27ddc611f55024a52b3d
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The embedded URI points to a URL that appears to be a lure for downloading a file, disguised as 'Age of Empires 2 game setup'. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it may exploit PDF vulnerabilities or embed malicious JavaScript to facilitate the download and execution of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffi.ru/aws?utm_term=age+of+empires+2+game+setup PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4411937/normal_5fccd8169c312.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406787/normal_5fa4b8a09d053.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374196/normal_5f89ab6cdf2f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f871f565c5eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373779/normal_5f8d37c0cc1b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369930/normal_5fcc22fcc5841.pdfIn PDF document text
    • https://rikurifijuse.weebly.com/uploads/1/3/4/6/134681474/jomukirenetalezatobi.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/e08236d3-4a8a-4160-83d0-9e50fd489bee/does_lucky_day_app_really_pay.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/medozumuwotesivim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d87a221-51d9-4b02-b583-ba7aef33ea79/3883271128.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/tamitetepupozunofadop.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_off0000d165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD165 5312 bytes
SHA-256: 4cd214994a0db1fb8e87c886fa7522fb4f2347b59473514ccf7fb2e7052f18b6
font_01_sfnt_off0000e368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE368 10732 bytes
SHA-256: eebc870a76967171acd6b1b2c60c3c30b96ec205cb17a22af5f8c405b32d4c72