Malicious PDF — malware analysis report

Static analysis result for SHA-256 acea6d9cad7424f3…

MALICIOUS

PDF

162.8 KB Created: 2021-02-13 12:01:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: b0452cebdc09c5886c8648d5113eb709 SHA-1: ef8051edbcf3f359771975e883dc83435ba30cc4 SHA-256: acea6d9cad7424f38854d2f708d29518614a39c7e2d006c466d588a96e7bf9db
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, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://jottigo.ru/123?utm_term=rlv+second+life', which is highly suspicious. Although no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to exploit users by directing them to a malicious external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jottigo.ru/123?utm_term=rlv+second+life PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4388046/normal_5febfdba577ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460970/normal_5fe2598eb4362.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450046/normal_5fd15d0cd407f.pdfIn PDF document text
    • http://passive-income.ru/sintagma_adjetival_ejerciciosfyrja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380883/normal_600a78cfb4ced.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471455/normal_5fc56b6d5ba85.pdfIn PDF document text
    • http://jafalule.22web.org/community_hours_certificate_template.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413120/normal_5ffb12dd84854.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457305/normal_5fdb6f44b3df3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://dazimosanugep.epizy.com/yamla_pagla_deewana_3_video_song.pdfIn PDF document text
    • http://ramapenutizawa.epizy.com/birthday_song_with_name_app_apk.pdfIn PDF document text
    • http://gikutixutawax.epizy.com/x1_carbon_8th_gen_datasheet.pdfIn PDF document text
    • http://jowofosepenomun.rf.gd/blackberry_link_for_macbook_pro.pdfIn PDF document text
    • http://womopemi.epizy.com/48461930476.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002330f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2330F 4484 bytes
SHA-256: b244d3f3ab85e9850858d7c4f95bdc08d1498e2c661e088c64132d512c56a3c5
font_01_sfnt_off0002425a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2425A 13628 bytes
SHA-256: 2eec091066ee527aacd4dfc69e521aedd2a2ea7e8cc4b8f2a39f7ee1d374d668
font_02_sfnt_off00026e39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26E39 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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