Malicious PDF — malware analysis report

Static analysis result for SHA-256 7146f05ef2c59e09…

MALICIOUS

PDF

84.2 KB Created: 2021-03-28 14:25:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d38a65b34154dd36e4b693c3a6e4bfc2 SHA-1: 20b488a590d721a502106c66a21de2628bb34dfd SHA-256: 7146f05ef2c59e09237350dff63d0485d0f6e00e946432d6e8465167237d698c
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/strik?utm_term=hitchhiker%2527s+guide+to+the+galaxy+game+1984 PDF link annotation
    • https://cdn.sqhk.co/lilaxikixo/sqx8ghf/47344444615.pdfIn PDF document text
    • http://lisuzigerob.mygamesonline.org/69538362945.pdfIn PDF document text
    • http://kowojolajamuv.getenjoyment.net/jojelumuposegimuzirok.pdfIn PDF document text
    • http://gubuxuk.scienceontheweb.net/18684359343.pdfIn PDF document text
    • http://kodepovorivapi.mygamesonline.org/ipcc_audit_amendments_for_nov_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/wexapitode/aBJLD7w/short_square_french_ombre_nails.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7e005a1c-fb68-43c1-af83-b854b6a2d282.filesusr.com/ugd/dcfb95_5edd11de3f2a4c0cacf3dac16491148a.pdf?index=trueIn PDF document text
    • https://ce55c564-0e79-48ac-bd91-a034cff8554b.filesusr.com/ugd/bd1fc0_9bc42b84229a4d98ac865d243e3a228f.pdf?index=trueIn PDF document text
    • https://314f4944-3dd9-45af-b5ee-fc7f46c963e4.filesusr.com/ugd/73cb9e_909b0f2c11694ed5972af0a590e0f6c3.pdf?index=trueIn PDF document text
    • https://2dcb0092-dd22-4cef-90c1-8c398f802bb7.filesusr.com/ugd/ff3115_f5fc280513ec4101aacd7fd85ab6bb53.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fizup/wheres_my_refund_2015.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/performing_data_analysis_using_ibm_spss.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/blackjack_game_app.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/how_to_reset_liftmaster_garage_door_opener_keypad.pdfIn PDF document text
    • https://ce722411-b424-48ee-ac00-b4ed8818edd9.filesusr.com/ugd/bff0de_3ab46028e5e74fbeae4a285bea0e570d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/88977051408.pdfIn PDF document text
    • https://93dbb2ad-f1e8-4c6c-adfd-2ef134399473.filesusr.com/ugd/df4650_11a9f0ef44064a6a8a660ae623dd535b.pdf?index=trueIn PDF document text
    • https://e028ba52-6c86-493e-86b7-fecf7cd1c3eb.filesusr.com/ugd/bcb9fd_1b797fddb87040edbe00ada9cbe22a4d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/casio_f_91w.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/wefozerogig.pdfIn PDF document text
    • https://37976aa0-f55f-47d3-847a-8d185b13ebf6.filesusr.com/ugd/1d6212_e3c2b14072bf4d3a80903c9e839adc9f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/inkbird_itc-1000f_manual_espaol.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_off0001074e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074E 6072 bytes
SHA-256: f7fade3a6b910962e0aa9c9166572bb9139f153abf9aad2c454f67369304fd42
font_01_sfnt_off00011be5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE5 11468 bytes
SHA-256: ee7965a22618b16968d4fdffe49f93ce9162e35572f063a61b8b284bb7208a81

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