Malicious PDF — malware analysis report

Static analysis result for SHA-256 d990abf225e8b831…

MALICIOUS

PDF

66.3 KB Created: 2020-12-30 09:32:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 26befd6dd830d59dc028b33fc0c2f954 SHA-1: be9ad9e971af0faeea849396e6863d0fe80f320c SHA-256: d990abf225e8b8316852de8510be67dd866b130d526810f2169416105dea584d
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, containing an embedded URL that leads to a suspicious domain. The document body, though heavily obfuscated, suggests a lure related to product sales, likely intended to redirect users to a phishing or malware distribution site. The presence of embedded URLs and the overall detection by security tools indicate a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafficel.ru/strik?utm_term=drum+machine+for+sale+near+me PDF link annotation
    • https://cdn.sqhk.co/kanedufopuma/jVghKhd/descargar_stickman_reaper.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483354/normal_5fc559ebd9156.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/hgaFhcx/best_ringtone_maker_app_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392237/normal_5f93db69c2967.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470836/normal_5fde89f45a2af.pdfIn PDF document text
    • https://sixapinipuso.weebly.com/uploads/1/3/1/3/131384402/risejivelafisasagobu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381532/normal_5f8b35fb7e277.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490250/normal_5febcaae49ea3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470962/normal_5fda544e2df35.pdfIn PDF document text
    • https://lerelapukuvi.weebly.com/uploads/1/3/0/7/130740054/1490928.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/9014515e-74f8-4e75-a0c4-f58ffc8fb811/manual_3ds_max.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cf6746c-8d8a-48b2-84ba-4c16c97dff62/kazomunegijifevimufuzuda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a14ef42a-8a89-4f40-9f91-705efb1f28c5/download_minecraft_pe_0.11_1_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_off0000c814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC814 5120 bytes
SHA-256: 4a50c680e9510795a0470caef87330edc6d5cfe5ce511d99d1cb081023b11e00
font_01_sfnt_off0000d95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD95A 10128 bytes
SHA-256: 23b9b5308122c663e7306cbbf8747501b5197dc1bd660633dc8f33aa00092388