Malicious PDF — malware analysis report

Static analysis result for SHA-256 3546317e6a89ad08…

MALICIOUS

PDF

110.0 KB Created: 2021-03-17 23:22:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a1178297f776c4308ea2dbffbfcbb36b SHA-1: 955f054498c878e0021128d668cf6f753b412cd3 SHA-256: 3546317e6a89ad08e4ad2197faf9d7f5d70c2b5837e7cf85c96076fec8e12198
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/123?utm_term=manolas+injury+report PDF link annotation
    • http://xoroketogejuxe.mywebcommunity.org/dell_venue_8_pro_windows_10_install.pdfIn PDF document text
    • http://badge-verification-center.com/sodaderirexr6c40.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478968/normal_5ff26dafdddd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424630/normal_60501cd31a8fe.pdfIn PDF document text
    • http://unosital.space/41159888435xis7z.pdfIn PDF document text
    • http://soldatskaya6.ru/90088305642ca7of.pdfIn PDF document text
    • http://autoupgrade.website/rexenizufakololugatenivizbaio7.pdfIn PDF document text
    • http://mizebojusur.mypressonline.com/anthony_giddens_en_defensa_de_la_sociologia.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://d6b7b3c7-8429-4d82-9d75-5d5d09e763cc.filesusr.com/ugd/a8c229_43630e4aeecd494281ee1679470c333e.pdf?index=trueIn PDF document text
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_ecd342d583774fcd8316da6b723ff34f.pdf?index=trueIn PDF document text
    • https://2e4d99de-9d37-4ce2-abd5-0bbccafdbe51.filesusr.com/ugd/33a2e4_1c8532649be1431d812430ba0b162b91.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/752e113e-30ff-43f1-acd0-a3a70c66595c/vikapojibelekirejawisupej.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/chamma_chamma_song_mr_jatt.pdfIn PDF document text
    • https://dedb376b-efc3-4528-ac10-fc65d12f866c.filesusr.com/ugd/5f6074_031240ae4eb2444bade882a909bfd66f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f31d1b60-4fce-4774-84b6-f3b5abe2ad54/how_to_disassemble_maytag_washer_agitator.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/what_is_the_salary_of_medical_lab_technology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d2f8d3b-29bf-42a4-935d-ec45ca60f002/psalm_23_commentary_bible_hub.pdfIn PDF document text
    • https://fe92b815-f0fe-4223-924b-659339f44b90.filesusr.com/ugd/8f64fc_cf147d2691b4478596474e13fb46024d.pdf?index=trueIn PDF document text
    • http://pujumek.myartsonline.com/69378247808.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/manual_variador_powerflex_700_en_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/vazuromegasip.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15468 4880 bytes
SHA-256: ba213a6e2c4209b71cec90c3657df878fba2ac7e03d07e5e02feb407e839f788
font_01_sfnt_off00016515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16515 18604 bytes
SHA-256: 70ec62f991b2baae43d3be0338f6c558f0933048bd8d572ec1e0807d48430c60
font_02_sfnt_off00019c11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19C11 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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