Malicious PDF — malware analysis report

Static analysis result for SHA-256 da095f5f5190a647…

MALICIOUS

PDF

82.0 KB Created: 2021-03-30 05:57:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b12b4920697e281023d15e2c647606eb SHA-1: d90621159660239b1e49c9e73de1a4f2dfe8d177 SHA-256: da095f5f5190a647572a48d5846a15fcc1e6b4a1eafc428f16ffe9811769b0b7
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 0.9996

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 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://jacksth.ru/123?utm_term=leadership+and+team+working+pdf PDF link annotation
    • http://munasimowijuxi.getenjoyment.net/lamunogobipepani.pdfIn PDF document text
    • http://fegivate.medianewsonline.com/command_prompt_codes_for_windows_10.pdfIn PDF document text
    • http://sowoxapexemex.sportsontheweb.net/sony_rx10_vs_rx100_vi.pdfIn PDF document text
    • http://bomezifubaf.iblogger.org/best_information_technology_jobs.pdfIn PDF document text
    • http://varuzajuv.22web.org/43839614203.pdfIn PDF document text
    • http://xitawefavam.medianewsonline.com/5738706012.pdfIn PDF document text
    • http://dolekil.22web.org/british_columbia_road_map.pdfIn PDF document text
    • http://lojupubevodi.22web.org/chartjs_tooltip_title_format.pdfIn PDF document text
    • http://tiwegopoguxuzu.mypressonline.com/online_translate_document.pdfIn PDF document text
    • http://vupojijodo.iblogger.org/bonita_bpm_tutorial_espaol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d427386d-3434-45d9-8802-370857a594f4.filesusr.com/ugd/accd1f_a84957c50d934c6f9e3757af46e36792.pdf?index=trueIn PDF document text
    • https://e1c07d4e-6587-4767-b76f-5dea9cf3e327.filesusr.com/ugd/51a829_6dfbd4e944424b7c96d1574810fdf0f8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5f157d3-07fc-4d38-9325-a170518dfe9c/kizufagupuxumanabiwukofog.pdfIn PDF document text
    • http://jilewotixa.epizy.com/how_to_send_usps_international_mail.pdfIn PDF document text
    • https://7aff118d-26f6-4d76-9bc9-1838009e7274.filesusr.com/ugd/f80014_67d9e2f0250742c28327d8e53f3c18a9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/40a8e0bf-8bbf-4dda-ba25-85a76057fac4/dennis_zill_complex_analysis_solution_slader.pdfIn PDF document text
    • https://bf68d742-fb98-404a-ab47-1dcf24f7df52.filesusr.com/ugd/83e7fd_070ef30580224a2f872d10ca8f1c3864.pdf?index=trueIn PDF document text
    • https://e301b21f-f707-426c-a094-6199d4b1a2d6.filesusr.com/ugd/f65518_839232c589d54f9ab731c46cf14240b7.pdf?index=trueIn PDF document text
    • http://goromanoza.rf.gd/kemevoxejezizagiko.pdfIn PDF document text
    • http://larujuzo.rf.gd/arabic_words_with_meaning.pdfIn PDF document text
    • http://zetulinug.rf.gd/how_much_should_i_expect_to_pay_for_a_hearing_aid.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10279 5520 bytes
SHA-256: d31c71c5c6d7c0cc47edb44088ecc83dac03228785ebcc88f4ef8a0901b21a62
font_01_sfnt_off00011531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11531 10996 bytes
SHA-256: 5534e6ae76e378502ae164a7d75e1e9a25eab20eb841188326b384602d8cd403

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