Malicious PDF — malware analysis report

Static analysis result for SHA-256 56cf43e3186b3e3b…

MALICIOUS

PDF

79.8 KB Created: 2021-04-06 12:06:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: d931ee9a544307d467140f68ee9def09 SHA-1: 82df94c2870c99f38df77a00b614a887c1d69895 SHA-256: 56cf43e3186b3e3b6ad5dff1ae785af1d933cab96b784761d09359ea57e9d980
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://dafemum.ru/award?keyword=antecedentes+de+la+contabilidad+gerencial+pdf'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of malicious URLs and the nature of the PDF heuristics suggest it is designed to redirect users to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/award?keyword=antecedentes+de+la+contabilidad+gerencial+pdf In PDF document text
    • https://cdn.sqhk.co/mibupufek/fKJjPih/56382285902.pdfIn PDF document text
    • http://xovuwowim.mypressonline.com/75309879088.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497079/normal_6022aa456150d.pdfIn PDF document text
    • https://cdn.sqhk.co/totafeta/Uhegija/xazafobuf.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/u0R8Tid/wimakidomifobugilizu.pdfIn PDF document text
    • http://likedizar.medianewsonline.com/how_to_replace_stove_top_knobs.pdfIn PDF document text
    • http://rubolanir.mypressonline.com/32474307499.pdfIn PDF document text
    • https://cdn.sqhk.co/lupekute/aheErrO/wapixerug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418188/normal_60347b7fe098e.pdfIn PDF document text
    • https://cdn.sqhk.co/temududote/iiughUM/16658577134.pdfIn PDF document text
    • https://cdn.sqhk.co/pawapoma/jcEjhbW/you_raise_me_up_secret_garden.pdfIn PDF document text
    • https://cdn.sqhk.co/mafowixodi/igicb7P/snow_bros_2_4_players_rom.pdfIn PDF document text
    • https://cdn.sqhk.co/nisikevepoxi/jbhbxAy/midivigixugomuri.pdfIn PDF document text
    • https://cdn.sqhk.co/tezikegoj/iibI33i/vorowefobedota.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377408/normal_60660c9838c96.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/gjogjBs/logic_pro_x_templates.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/bidurudilidujug/2016_subaru_forester_reviews_consumer_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/vonemagavale.pdfIn PDF document text
    • https://s3.amazonaws.com/xulikamul/armstrong_air_furnace_fault_codes.pdfIn PDF document text
    • http://fabedidatifi.onlinewebshop.net/adjective_and_adverb_worksheets_with_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/jovoluvis.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/chinese_grammar_wiki_book_elementary_download.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_off0000f710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF710 5452 bytes
SHA-256: aedc6e82d82022f980df4c7be9b93c3d2551b791f401c16b81a59fe966968fa4
font_01_sfnt_off000109a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A4 12012 bytes
SHA-256: 00f23e1c1d94f3dbbc7a582d45aff4be37c7ab4457dffeff3b712ee96a10fc5b

Open this report in the interactive analyzer, or submit your own file for analysis.