Malicious PDF — malware analysis report

Static analysis result for SHA-256 09d0c8b8224dd633…

MALICIOUS

PDF

76.3 KB Created: 2021-03-12 06:47:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8e7f19c43f452b0ea374d4017726d625 SHA-1: 9985cb02f998ce1c85d0a4b5ef05cfa2988eb63e SHA-256: 09d0c8b8224dd633ed393463ada8ac32c3f32bc5b971f4b855f0897efa845fda
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://leonvi.ru/award?keyword=bhartiya+samvidhan+ki+prastavana+pdf PDF link annotation
    • http://rexonina.medianewsonline.com/38834643265.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381971/normal_5fed79d7ddf03.pdfIn PDF document text
    • https://cdn.sqhk.co/zumedizojas/ggspMgj/craftsman_truck_tool_box_plastic.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/ikmrhhD/wallops_launch_schedule_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460980/normal_5ffd98a64baaf.pdfIn PDF document text
    • https://mifakukataw.weebly.com/uploads/1/3/5/3/135349500/65ea7c32c.pdfIn PDF document text
    • https://cdn.sqhk.co/lulamekajasu/idhihbk/69021973645.pdfIn PDF document text
    • https://cdn.sqhk.co/fagevibe/fjcgeic/lafasiz.pdfIn PDF document text
    • https://cdn.sqhk.co/sulezudipozi/ojhjhUy/virtual_classroom_background.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415046/normal_6035a2ec45a1d.pdfIn PDF document text
    • https://zoseduzarososu.weebly.com/uploads/1/3/2/7/132740870/a6200.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410214/normal_5ff66b97965ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4506063/normal_60446f0ca2101.pdfIn PDF document text
    • https://toxutumopomepe.weebly.com/uploads/1/3/5/3/135327812/gamaza_paviramere_bevavebupa_jelofu.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://uploads.strikinglycdn.com/files/abdf4841-c07b-480f-b815-d167247f20da/23922791625.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ba3ca29-4807-4fae-9d4d-40e654dee9cf/dir-880l_firmware_update.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/901e927c-cc8f-4df7-a0c2-7c2d500c0abd/98017411427.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44a454f0-bdf2-4fab-b933-0f1dca3a265f/2010_camaro_2ss_convertible_for_sale.pdfIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/liwuniniwadivizupuponewu.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_off0000e0f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F2 5084 bytes
SHA-256: 3ac8dad0d4cd09bbd1064ee1ea7f117a021b632b06e938149e84b7b05db7d226
font_01_sfnt_off0000f217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF217 10360 bytes
SHA-256: 66b112d3fdd0f83ba1998570c7c35ea1b5fc8fa22eb93e223c84311ae13e7c24
font_02_sfnt_off00011540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11540 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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