Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb3969e6eff5fab9…

MALICIOUS

PDF

89.7 KB Created: 2021-03-01 17:14:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e4c1e2a21b1486d2b4935ad83df19eb7 SHA-1: bd2d8e2cc0cc9e90b20e47d9c2840be566bd7cf1 SHA-256: cb3969e6eff5fab956d5ff402d8e10f01e1d2f787c62b4102f405c576ae05532
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs and references a popular game to potentially lure users. The presence of many external links suggests a link farm or phishing attempt, and the document's structure is indicative of a malicious PDF designed to exploit vulnerabilities or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://fokemale.ru/wix?keyword=clash+of+clans+highest+level+player PDF link annotation
    • https://jotonude.weebly.com/uploads/1/3/1/3/131398177/888993.pdfIn PDF document text
    • https://tezenilul.weebly.com/uploads/1/3/6/0/136085996/d0ceb0dbf34762b.pdfIn PDF document text
    • http://zuduwamani.mypressonline.com/51487435174.pdfIn PDF document text
    • https://cdn.sqhk.co/vifamepupib/9giGy4S/lebonafonuru.pdfIn PDF document text
    • https://guxovegetixewaz.weebly.com/uploads/1/3/2/3/132302910/6806565.pdfIn PDF document text
    • https://cdn.sqhk.co/belumozobu/iaql7O6/four_pass_loop_colorado_permit.pdfIn PDF document text
    • http://fejukoturig.medianewsonline.com/nautical_knots_framed.pdfIn PDF document text
    • https://cdn.sqhk.co/xenivoronizu/fcih2jb/56602159711.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/quantum_field_theory_demystified_free_download.pdfIn PDF document text
    • http://kunonelujaver.22web.org/email_formale_inglese_lavoro.pdfIn PDF document text
    • http://jenerotisa.mywebcommunity.org/sokuka.pdfIn PDF document text
    • https://tejenopaje.weebly.com/uploads/1/3/1/1/131164027/15ace.pdfIn PDF document text
    • https://cdn.sqhk.co/ruselaguzoda/Pijjd8C/billie_eilish_lovely_lyrics_video.pdfIn PDF document text
    • https://loxigiberojawi.weebly.com/uploads/1/3/4/7/134770663/defuj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://damikofem.rf.gd/calculating_magnification_worksheet_ks3.pdfIn PDF document text
    • http://japinoxizidunub.myartsonline.com/how_to_remove_adt_panel_from_wall.pdfIn PDF document text
    • http://belibivizonojo.myartsonline.com/80325092153.pdfIn PDF document text
    • http://tosakiviga.rf.gd/bettys_diagnose_episodenguide_wiki.pdfIn PDF document text
    • http://tosowepexinuf.epizy.com/atm_ka_full_form_kya_hua.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_off00012413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12413 5344 bytes
SHA-256: d8090ea5a6092cde755dfdf28e3489476959b488f91311aa147d03e3f7e0603a
font_01_sfnt_off0001364e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1364E 10280 bytes
SHA-256: f3735948482f6706dbfe8f8b28d0422955d12ae7b3a38a27fee4fe504448e21a

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