Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a3c7aae0949701d…

MALICIOUS

PDF

81.2 KB Created: 2021-03-13 15:31:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 787fb3389552428f73408ede44096a5e SHA-1: 408bba7f8b2492d0fda41aefdcf69e1f290b7905 SHA-256: 5a3c7aae0949701d66125a015355cbb6598d170d321edb2e3c77a4e05bb8f2de
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. No scripts were extracted, but the presence of external URLs suggests an attempt to redirect the user to a malicious site.

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://crophysi.ru/award?keyword=miller+analogy+test+pdf
    • http://vomidujoma.scienceontheweb.net/7402766474.pdf
    • https://cdn.sqhk.co/foropogajag/m2jaj4X/14394305397.pdf
    • https://cdn.sqhk.co/dixejetafap/gfidOzR/8248514116.pdf
    • http://dapajurop.mygamesonline.org/who_is_the_sexiest_man_2020.pdf
    • http://xegazinijitup.mywebcommunity.org/vibumep.pdf
    • http://zelumefepa.sportsontheweb.net/how_to_calibrate_a_blood_sugar_monitor.pdf
    • http://nutesane.iblogger.org/mips_addressing_modes_full_form.pdf
    • https://cdn.sqhk.co/reparepoki/hj25phi/printable_calendar_october_2020_with_holidays.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://misanedajog.myartsonline.com/jovizeledane.pdf
    • http://totuxivez.onlinewebshop.net/71238756308.pdf
    • https://8d2868a3-57b7-484c-81f6-493c1c4f5daa.filesusr.com/ugd/a8ca0f_fa8cde694d9241ed84865cf1059988cd.pdf?index=true
    • http://pubojisa.epizy.com/pibat.pdf
    • https://cb6d8354-940b-4e05-9f1d-0150973ab277.filesusr.com/ugd/882da0_738c24d5cf4049fa9e2f9ab4ea7272bf.pdf?index=true
    • https://s3.amazonaws.com/kotenu/learn_more_python_3_the_hard_way.pdf
    • https://s3.amazonaws.com/dorobukasawituw/excel_2010_bedingte_formatierung_nicht_leere_zellen.pdf
    • https://s3.amazonaws.com/paxuvagal/who_invented_the_lightbulb_before_edison.pdf
    • https://012a8781-80b6-4d33-8f63-56d56ef93f15.filesusr.com/ugd/6d3794_f3c6e85997274e99856804130512b715.pdf?index=true
    • http://fezexebu.rf.gd/3121426475.pdf
    • http://jalijoruki.atwebpages.com/89698762461.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc29.bin
d750e2b27efd91d37b7af831cca517226b815a4a19889e67ec018229e01e3baa
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC29 5316 bytes
font_01_sfnt_off00010e66.bin
b45f83e03c08dff0a6a537b0da77837509cf9e87be00c8cdd488b3885327eb74
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E66 12384 bytes