Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce2eee0bcf85a954…

MALICIOUS

PDF

65.9 KB Created: 2021-03-19 07:12:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: c3f7b476034e4b4cd56c90bf009e8178 SHA-1: e30144e3687866297c722e722d7fe14c5bbfe827 SHA-256: ce2eee0bcf85a9547ba69eebd3a4e18fd619b76d0df2a80ec86a7f122fb7390d
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware sites. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://bologen.ru/wix?keyword=lesson+2+the+nature+of+liquids PDF link annotation
    • https://vesepuzimimewij.weebly.com/uploads/1/3/0/7/130776402/tazog.pdfIn PDF document text
    • https://cdn.sqhk.co/wejideduv/actOncG/50451071125.pdfIn PDF document text
    • https://mefifusefom.weebly.com/uploads/1/3/4/2/134266023/6d1db0045b.pdfIn PDF document text
    • http://zebizadojol.iblogger.org/c_aptitude_questions_with_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/fiwujumejuf/AKgd0J3/pefulowazozom.pdfIn PDF document text
    • https://cdn.sqhk.co/lilapanorup/jiWibgh/dictator_ancient_rome_definition.pdfIn PDF document text
    • https://piladokad.weebly.com/uploads/1/3/4/7/134759874/9378597.pdfIn PDF document text
    • https://cdn.sqhk.co/fimegasaz/helhjia/49428993167.pdfIn PDF document text
    • https://cdn.sqhk.co/xakurusuk/ihgEFgi/38768999221.pdfIn PDF document text
    • https://metuliwilive.weebly.com/uploads/1/3/4/3/134386481/0ef942ac263271.pdfIn PDF document text
    • https://cdn.sqhk.co/mapetidul/aSKieF0/2584632979.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://surozot.rf.gd/final_census_data_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/salem_witch_trials_documentary_worksheet.pdfIn PDF document text
    • https://a001dc82-f31e-4944-9b76-0a8e602b6855.filesusr.com/ugd/e4ee87_6f120b4c356f4a71b0498fa343b3a635.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/garorowa/kobututudokekidatapikel.pdfIn PDF document text
    • https://46d16763-6c5f-4e19-aa2c-3f4071fcbec2.filesusr.com/ugd/26f730_5871622963ff43b49655db4bf66b994d.pdf?index=trueIn PDF document text
    • https://ebba3e40-d49f-4cc8-b137-373bb1124918.filesusr.com/ugd/384ea4_8cf2cffb9f4f4f40868002c6f6e71730.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/mr_coffee_espresso_maker_manual_ecm250.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/california_notary_acknowledgement_form_2019.pdfIn PDF document text
    • http://torobedi.epizy.com/jotobafexifaxixob.pdfIn PDF document text
    • https://87164119-88a6-4d6d-a72f-b109cf2d88b9.filesusr.com/ugd/bd0a66_7a41e07f87d94b87809b0521e7736665.pdf?index=trueIn 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_off0000c62f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC62F 5192 bytes
SHA-256: 36cf4b2177b524e94c879d7da8c603966b27836539dec6a95aab69c30eebddfe
font_01_sfnt_off0000d7cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7CF 9788 bytes
SHA-256: be92cc394544f05ca154eaa4b4a9d2c913f945216609db7e4aba6cb1da2a7771

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