Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4c1568bff5424a0…

MALICIOUS

PDF

70.8 KB Created: 2021-03-02 18:46:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 5659315ffc4673410d2966a1267041c3 SHA-1: 2b9120524a6499bb4bbdcaa24c24be089dc1fe19 SHA-256: d4c1568bff5424a0c5dd0c277ce803a05f34af7e8b92e88e1509df69dcb534a4
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The embedded URI points to a suspicious domain, likely part of a phishing campaign. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site for credential harvesting or malware delivery.

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://gimoguvi.ru/123?utm_term=how+to+use+attachments+on+shark+professional+vacuum PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377938/normal_600dd8ec161d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464720/normal_5fe217922581c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479433/normal_6036d2fdc20e0.pdfIn PDF document text
    • http://carbackseat.site/mera_gana_baja_de_song_mingkzzjt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498842/normal_5ff79de7ba151.pdfIn PDF document text
    • http://cucoupon.info/nsfas_online_application_form_20186uawx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385648/normal_6005bc60e1923.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384150/normal_5fc6024297c59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419195/normal_6026e7ed3040f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495240/normal_603bebd1ac29c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419623/normal_5fdbaaf896be4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379837/normal_5fd7614559b4d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zudozam.epizy.com/android_eddystone_beacon_tutorial.pdfIn PDF document text
    • http://lisunamubeso.epizy.com/zuwukabewumawulaguwifesu.pdfIn PDF document text
    • http://ketaxesam.epizy.com/64673255963.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_off0000d9d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D3 5432 bytes
SHA-256: 7bb414de87395455c0f6ba0762e7810c0ad47b881a1c380b8ec31ab050b1dd58
font_01_sfnt_off0000ec3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3A 9816 bytes
SHA-256: bf82c2980c8cbf77aecebf3801d405684dc09ccf24b1263f493a8262f0caa7ee