Malicious PDF — malware analysis report

Static analysis result for SHA-256 3092b1a8df7df076…

MALICIOUS

PDF

78.9 KB Created: 2021-03-16 10:28:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 23121fe2e443db0b3e9c550245449c45 SHA-1: 1ff8b821efe71ddf800eb607a084c765ecc15138 SHA-256: 3092b1a8df7df0763f7f045b8537a8ebca0f18076f56cc4ed1adeebd573a727f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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 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/123?utm_term=aparato+reproductor+femenino+informacion+para+ni%25C3%25B1os PDF link annotation
    • http://tiktokfrance.fun/579654767763w0n4.pdfIn PDF document text
    • http://debagigitefofo.iblogger.org/extent_report_testng_adapter.pdfIn PDF document text
    • http://wunowixumofe.22web.org/i_am_angry_quotes_in_hindi.pdfIn PDF document text
    • http://vidclips.design/jodukalm8uzq.pdfIn PDF document text
    • http://fenotowibezusen.iblogger.org/nuvenijudaguda.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zopusawonomiwi.rf.gd/tiger_rice_cooker_5.5_cup_manual.pdfIn PDF document text
    • https://48e4e0df-78ce-4736-8797-27735e68dc67.filesusr.com/ugd/f3b179_5f821f3976ea4f6986ec2032115a8260.pdf?index=trueIn PDF document text
    • http://dodarululi.epizy.com/kivelobizipigimenutigebe.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/arabic_language_software_free.pdfIn PDF document text
    • http://naremijex.epizy.com/zebaninuzobov.pdfIn PDF document text
    • https://f770b3d7-c897-40e0-9323-5ad0abd91552.filesusr.com/ugd/1fa6dd_3fa8e5bc8f9943be8dbd5d1f1ad22a85.pdf?index=trueIn PDF document text
    • https://f635e5d9-31b1-4f19-b758-7a623be10181.filesusr.com/ugd/6cf0f5_2a3d6d1d20d344efa516c3d91c9844d6.pdf?index=trueIn PDF document text
    • https://7692249a-17df-4225-ab6d-779169fb9a0a.filesusr.com/ugd/607883_df1ce8b8d279466899c3d0cbfd75b202.pdf?index=trueIn PDF document text
    • http://jinibodakix.epizy.com/i_miss_you_korean_drama_song.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/superman_vs_batman_game_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/belzona_1212_safety_data_sheet.pdfIn PDF document text
    • https://78151a86-a557-4e49-81aa-a2539eea45c7.filesusr.com/ugd/204f4f_9dee713f9d594a58b3772b35f06b6ca1.pdf?index=trueIn PDF document text
    • http://puligop.epizy.com/deus_ex_mankind_divided_platinum_trophy_guide.pdfIn PDF document text
    • https://5a6df620-610b-4d6f-8f1b-71e936bb70bc.filesusr.com/ugd/1f5cef_28b8224cd6f847fa88fda4889afbae2f.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_off0000f16f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16F 5468 bytes
SHA-256: c5cf8b2ef83449e6185a72a8c6df83aab4cf8eb58b1cff24896284892e9128a7
font_01_sfnt_off000103b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B8 12424 bytes
SHA-256: b9944127851681e6e0617568cad009ad486ced24c57d00636a5bf079e041e3fb

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