Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4357a6e2bcfd30b…

MALICIOUS

PDF

73.0 KB Created: 2021-03-21 00:49:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad3c0b2f46d6dbd1dafd14606cf608af SHA-1: 56941d4de8d4c55c0c419e1a8a6fdb9eb27c2e7e SHA-256: a4357a6e2bcfd30b4eed22dee7256a0ff14be14c4d140161339eb5138ea75033
104 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The presence of an external URI pointing to a suspicious domain, combined with heuristics indicating urgency lures, suggests this PDF is designed to trick users into visiting a malicious website. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are typical of phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://botokaw.ru/award?keyword=able2extract+pdf+converter+apk
    • http://polypak.site/what_to_do_if_your_aux_cord_doesnt_workzdlp7.pdf
    • http://duvikerogene.iblogger.org/nedovaba.pdf
    • http://unonatur.space/fitbit_inspire_2_clipmu2bj.pdf
    • http://sajiwurejedetu.sportsontheweb.net/gewoba.pdf
    • https://cdn.sqhk.co/serodozire/c0amlhe/85997566906.pdf
    • http://faxadiweruxu.22web.org/away_in_a_manger_chords_piano.pdf
    • https://cdn.sqhk.co/tororukiwuri/Tjhhggh/2091141844.pdf
    • https://cdn.sqhk.co/wemonamo/Yhd3hfj/wudexew.pdf
    • https://cdn.sqhk.co/woxemevimox/Gjdatii/register_as_self_employed_hmrc_form.pdf
    • http://nozatisesufi.scienceontheweb.net/9276425630.pdf
    • http://generalmassage.online/20660732229xg1nm.pdf
    • https://cdn.sqhk.co/wenisuvuroju/jeghujc/15538898141.pdf
    • http://rupazaduxil.mywebcommunity.org/70712179977.pdf
    • http://gugukisu.iblogger.org/63938213547.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/679b92da-36cc-48eb-9e01-c2b1a8058ca1/nubawuko.pdf
    • http://vegubom.atwebpages.com/les_bactries_anarobies.pdf
    • http://jelomasulavi.atwebpages.com/vibiwitobexukewir.pdf
    • http://suwuriru.onlinewebshop.net/lawelox.pdf
    • http://bageradafasuk.rf.gd/marriage_invitation_website_templates_free.pdf
    • https://uploads.strikinglycdn.com/files/1a31ab79-6041-43e7-b0e5-962a14daef60/walijixofaje.pdf
    • https://uploads.strikinglycdn.com/files/a2b6cd36-a418-47b2-b8ab-3fab80039625/necky_looksha_17_price.pdf
    • http://murapimopavopa.myartsonline.com/bcs_theory_of_superconductivity_nptel.pdf
    • https://uploads.strikinglycdn.com/files/b3720096-2b1b-4fd0-b952-efab7e21c9f0/pepigizipexuzasejit.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_off0000df34.bin
9ae4f8dfc27e049c59f6795bf8a56ea8da78bebd2385931780d67b6a6b7d59db		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF34 5424 bytes
font_01_sfnt_off0000f1c6.bin
150b4f3ae3d5c293c57a89965c76863f667f58d5ce712c1a6a2725437a44d342		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C6 10716 bytes

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