Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f6e5608bc48d2c0…

MALICIOUS

PDF

80.4 KB Created: 2021-02-27 13:53:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 4541d4b4ef03a31fc3848b5382aeba24 SHA-1: 79fedb9ba415e91417181c40d9c372a6f2b5f5fd SHA-256: 9f6e5608bc48d2c01815fad6ff8508adfebb345e9b3fd944891b203aae941f4e
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with a TV show title, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://dafemum.ru/strik?utm_term=power+book+2+season+1+episode+6+release+date In PDF document text
    • http://tozofuji.scienceontheweb.net/literary_elements_worksheet.pdfIn PDF document text
    • https://vabuxijipureg.weebly.com/uploads/1/3/4/4/134476882/640090.pdfIn PDF document text
    • http://kijofizovurisos.medianewsonline.com/how_to_use_ge_gas_self_cleaning_oven.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375070/normal_600bcd3c2b06a.pdfIn PDF document text
    • https://cdn.sqhk.co/modajili/05pPobK/fireboy_and_watergirl_4_the_crystal_temple_friv.pdfIn PDF document text
    • https://dawasaga.weebly.com/uploads/1/3/0/9/130969366/xosovotigapelevafore.pdfIn PDF document text
    • https://pexerewiku.weebly.com/uploads/1/3/5/3/135313352/nudanisatasi_guwozatafiri_pozoronemobeg.pdfIn PDF document text
    • https://nejavolezi.weebly.com/uploads/1/3/4/0/134017816/ecf85ed15e799.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418391/normal_600ca0e94d8cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476593/normal_5fdc2dac4b2f4.pdfIn PDF document text
    • https://cdn.sqhk.co/rurufimibiwe/gehdC5j/linuzanat.pdfIn PDF document text
    • https://cdn.sqhk.co/jekurona/hfii3Eu/onedrive_login_error_0x8004de86.pdfIn PDF document text
    • http://mumolazesinidix.getenjoyment.net/why_is_my_aux_cord_not_working_iphone_7.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/jedobufudajewu/80886072711.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/durga_saptashati_path_vidhi_in_marathi.pdfIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/takodutezafokolamaj.pdfIn PDF document text
    • http://forojiwimudobo.atwebpages.com/how_to_make_a_mind_map_online.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/havana_song_mp4_camila_cabello.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/dapifupiva.pdfIn PDF document text
    • http://rukosivujuxu.atwebpages.com/free_bible_commentary_download_for_android_mobile.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_off0000fba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA6 5588 bytes
SHA-256: 230f034c0a2003ec85b6cd2cd9ce1d70c041b05bf2678afbba69c102c31e7ea3
font_01_sfnt_off00010ece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ECE 10756 bytes
SHA-256: 0680f09774a562b35f47e65451dcf5ea37fd66b2592ffc02e451cdb1b1468c93

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