Malicious PDF — malware analysis report

Static analysis result for SHA-256 84e7308f03913b60…

MALICIOUS

PDF

77.3 KB Created: 2021-03-19 09:17:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 69e583d43711fb63f1969af23cf19757 SHA-1: 8b4bc97ebbff2508094b2e9f285150013565dd6f SHA-256: 84e7308f03913b607c4c15f0700d15d715ef9651a1bbd41f7a4082627baebf7c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

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 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.
  • 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=walmart+care+plan+registration PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486221/normal_5fd7de04065af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368469/normal_5ff16baa25b96.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/71290228907.pdfIn PDF document text
    • http://zitalogeloluwiw.mygamesonline.org/positive_spirit_body_mind_and_soul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454971/normal_5ffffbf61d065.pdfIn PDF document text
    • http://gefosezidubajoz.scienceontheweb.net/charles_hodge_systematic_theology_volume_1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://438e95ed-c264-4db5-88d3-1a9ca8b91b86.filesusr.com/ugd/733c1f_033b795a33834f8eb601c421e7d250e7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/legipalofi/how_to_write_feedback_form_for_workshop.pdfIn PDF document text
    • https://c6f55193-7475-4343-97dd-33cb3b141b6a.filesusr.com/ugd/808d8c_514c279cc93845aba7dd5af16e6422f0.pdf?index=trueIn PDF document text
    • https://2f2ab42d-e0b4-4bd3-aa50-2430da1ff5fc.filesusr.com/ugd/eaf48f_12c912b1c11c4b6fb6875e2942054f1e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lepefi/gewiw.pdfIn PDF document text
    • https://01ff271a-2d66-4e22-ac0f-a796646d2f56.filesusr.com/ugd/8d93e9_38478e05baf7481fb7d9e1f42357a693.pdf?index=trueIn PDF document text
    • https://7835c217-6b95-46a1-915a-76cdebae3fe0.filesusr.com/ugd/debfb4_b0c98576d32248729cd991f77b3f6ec7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/52043081086.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/yakuza_kiwami_pocket_circuit_guide_champion_cup.pdfIn PDF document text
    • https://85fc0914-20e3-4f1c-be8c-de7e6f89f47e.filesusr.com/ugd/a44510_fb280b6dd4ca446ba57aeec7aa894be9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dekogamik/autocad_plant_3d_2015_free.pdfIn PDF document text
    • https://d4078116-a2d5-466f-97e6-20d899f6ca30.filesusr.com/ugd/576447_8ec8058e588d43258a971a460f9d901b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/search_warrant_template_virginia.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/93528224585.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_off0000effa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFA 5268 bytes
SHA-256: 94643041cf89644d6a8b7976dd453a6385090ca741b646a05daebc8ef862ccf1
font_01_sfnt_off000101da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DA 11220 bytes
SHA-256: 256f1a5d37527cb50dce26a85536bee307e559ad1d586cb4107b181e845b92c2

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