Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3600a6fd417299e…

MALICIOUS

PDF

76.7 KB Created: 2021-02-11 14:51:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: baf3e050e4de37214d9de103f4184f46 SHA-1: 3350866a924080722428071758487ae253be5165 SHA-256: c3600a6fd417299eca0bee15cd4a0bdeb6c5dab0b99c2968a9cecb689055b594
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 0.9998

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://jottigo.ru/wix?keyword=hollywood+babylon+2+pdf PDF link annotation
    • http://wiinorama.website/3618471690nz2o7.pdfIn PDF document text
    • https://molesomux.weebly.com/uploads/1/3/2/6/132681378/46688a5e8dcdb5.pdfIn PDF document text
    • https://resonorur.weebly.com/uploads/1/3/4/8/134874279/7403742.pdfIn PDF document text
    • https://zonapabudaxaj.weebly.com/uploads/1/3/4/0/134017389/vejus_nefozozu_wazuna.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366653/normal_5fdf4f921d9c9.pdfIn PDF document text
    • http://mail-autoscout24.net/86716929686fbd8q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503197/normal_6006bec6234a8.pdfIn PDF document text
    • http://banque-populaire.best/70534366762yzfo.pdfIn PDF document text
    • https://ranemexamegen.weebly.com/uploads/1/3/4/4/134440137/fazibopujavub-wikep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459926/normal_6015e1ed3d2b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411252/normal_5fcf12f2beb9e.pdfIn PDF document text
    • http://redita.fun/ejercicios_isometricos_para_fortalecer_las_rodillasesrch.pdfIn PDF document text
    • http://sparzha.club/46950315761j4jjo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/66333148493.pdfIn PDF document text
    • http://molodetagako.epizy.com/best_background_images_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/40366919129.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_off0000f097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF097 5188 bytes
SHA-256: dd2c5c64a76580dae81d5d3f4f6b7b839f58969cbba136f67306a0c34c4bd41a
font_01_sfnt_off0001026d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026D 10360 bytes
SHA-256: 6c6bbeac497fd3ac4c0367c1ec578071283c5a92ab4808efc27ea66d001729e3

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