Malicious PDF — malware analysis report

Static analysis result for SHA-256 43a2b6775d749899…

MALICIOUS

PDF

163.1 KB Created: 2021-04-19 20:19:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 47e99088fbab22e7f28f167893a8f2c8 SHA-1: 0dfcc0ad59721180e8029d95949ef5bfd193eaed SHA-256: 43a2b6775d74989929d7f9e71de100c5cbc341f338239925ccae8e1eda9d554a
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure related to 'Westworld season 1 episode 6 script'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9810

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=westworld+season+1+episode+6+script In PDF document text
    • https://cdn.sqhk.co/bofozuto/kQjf77t/download_game_dead_rain_2_tree_virus.pdfIn PDF document text
    • http://dotixomovi.sportsontheweb.net/vurakezozudivukugafukaw.pdfIn PDF document text
    • https://puwirobazavuwo.weebly.com/uploads/1/3/1/4/131453501/c8bcca47d593a2.pdfIn PDF document text
    • http://fexodubavilukub.22web.org/a_valiant_life.pdfIn PDF document text
    • http://pesuloduf.medianewsonline.com/murosepubajotazukimelavul.pdfIn PDF document text
    • https://cdn.sqhk.co/gekobegij/jfIhcuP/clarinet_sheet_music_songs.pdfIn PDF document text
    • http://jawazapefaxuzit.mywebcommunity.org/dark_glass_alliance_book.pdfIn PDF document text
    • https://fubexomufepa.weebly.com/uploads/1/3/4/8/134850999/5261489.pdfIn PDF document text
    • http://kejoxemubogese.mywebcommunity.org/vinufanamar.pdfIn PDF document text
    • http://winovigamaj.mygamesonline.org/sazasalesidomagipe.pdfIn PDF document text
    • https://cdn.sqhk.co/widafopaj/bjb8rLV/teva_flip_flops_near_me.pdfIn PDF document text
    • https://gurigiwavipum.weebly.com/uploads/1/3/5/3/135316834/7795f99e2.pdfIn PDF document text
    • http://pepariravifaza.getenjoyment.net/what_can_a_crp_blood_test_show.pdfIn PDF document text
    • http://rivafigikiwax.medianewsonline.com/52141492508.pdfIn PDF document text
    • https://zakogekumepaxu.weebly.com/uploads/1/3/4/5/134598029/ddbc9e33909.pdfIn PDF document text
    • http://nuxipawuxodiwa.getenjoyment.net/55657669064.pdfIn PDF document text
    • https://wenuzivubog.weebly.com/uploads/1/3/5/3/135392435/70eba078.pdfIn PDF document text
    • http://zodatowafe.getenjoyment.net/88547099773.pdfIn PDF document text
    • http://poxumanavofeboz.scienceontheweb.net/76995354131.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://kenesowozowojaw.myartsonline.com/99469752090.pdfIn PDF document text
    • http://filopatoj.rf.gd/linear_search_program_in_c.pdfIn PDF document text
    • http://kepawomokatuke.myartsonline.com/96591802714.pdfIn PDF document text
    • http://mobopufo.rf.gd/sailor_moon_manga_ita.pdfIn PDF document text
    • http://zikoliduxa.atwebpages.com/xejibuxokige.pdfIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/uscg_aeromedical_manual.pdfIn PDF document text
    • http://fewetero.epizy.com/nosegewadon.pdfIn PDF document text
    • http://zavinawotomuvef.epizy.com/rosugopekuka.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23037 5380 bytes
SHA-256: cc344a623036de1a9abaecf75e6e9b2037427c364e35f63877de95edf651a81a
font_01_sfnt_off0002429e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2429E 6148 bytes
SHA-256: 149738eb3e1d0bfb4a5732e89a115965e6f0cf3fc4971c694d3ce3619176544d
font_02_sfnt_off0002527d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2527D 13252 bytes
SHA-256: fcf159e7eab1d5c1b52971b45a9a388c0d2a234220b1903ce7bdefdd771c5bb5