Malicious PDF — malware analysis report

Static analysis result for SHA-256 874747fe98d4fbf7…

MALICIOUS

PDF

73.1 KB Created: 2021-02-16 08:22:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 06177315272dec4394dabc0ab409c685 SHA-1: f5e8c2ce3edc2f0b53a7604a70034103d4b145db SHA-256: 874747fe98d4fbf7771b7f0a2f0287c80746695beeb5450cd58dca2cfb385014
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains a URL that is likely used to deliver a malicious payload or redirect the user to a phishing site. The presence of embedded URLs and the overall detection score strongly suggest a phishing or malware distribution attempt.

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://jottigo.ru/wb?keyword=why%20my%20dryer%20keeps%20stopping PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378599/normal_6023dd935305a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381541/normal_6025de7c6e126.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/2OLjbgc/graphic_design_apps_free_online.pdfIn PDF document text
    • https://cdn.sqhk.co/jopubelo/hhbS0ij/detuluvi.pdfIn PDF document text
    • https://cdn.sqhk.co/regavebike/Ijbkgex/6101011166.pdfIn PDF document text
    • https://cdn.sqhk.co/nakunadubux/Yghgfjc/kasewarip.pdfIn PDF document text
    • https://cdn.sqhk.co/zikonidenijo/cS3jh3j/roller_rush_download.pdfIn PDF document text
    • http://sallles.ru/perudivojopagewujevoz8jmx4.pdfIn PDF document text
    • https://cdn.sqhk.co/gorilotinedo/2ShiqEV/mudding_trucks_for_sale.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383136/normal_5ff08647771b0.pdfIn PDF document text
    • https://cdn.sqhk.co/wefenilu/cojbrQs/glyph_of_warding_5e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367937/normal_5fec76adf0599.pdfIn PDF document text
    • http://gizaxeredemuni.22web.org/31690523112.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tudawufed/abgn_ac_wifi_adapter_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/lowebemuwojiso/landscape_background_images_hd_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/bharathiar_university_distance_education_mba_syllabus.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/circumference_worksheets_grade_7.pdfIn PDF document text
    • http://kawugugo.epizy.com/87677610891.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_off0000de56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE56 5308 bytes
SHA-256: 73a61532bc4badad00240c7c516a568c3f272000a49d03ca36228f9ccb6c4714
font_01_sfnt_off0000f051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF051 10860 bytes
SHA-256: 1d95662f1241673d6956cc7cb3f66c4e0d86ce4200fc1eea2a40f6fc37e009cc

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