Malicious PDF — malware analysis report

Static analysis result for SHA-256 859f47e31cf9b7c1…

MALICIOUS

PDF

85.8 KB Created: 2021-04-09 18:23:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: fe2907eff947f8dc886aa74ae96b33a2 SHA-1: b1148f72e22b15cf2e3907806c497d33c108e39d SHA-256: 859f47e31cf9b7c13374293f6cad50d848d94519474c8319f728c4057f599105
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 0.9997

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 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://dafemum.ru/strik?utm_term=how+to+learn+advanced+english+speaking PDF link annotation
    • http://rat-red.space/baptism_certificate_template_fillabler1jm1.pdfIn PDF document text
    • http://storefromit.pro/urie_bronfenbrenner_biography3xgs1.pdfIn PDF document text
    • http://nupukenuba.iblogger.org/magnetocrystalline_anisotropy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417997/normal_5fd7bd47c5ed4.pdfIn PDF document text
    • https://kojulijorivo.weebly.com/uploads/1/3/4/3/134329781/01bdcf4e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366381/normal_5fc6915cb5714.pdfIn PDF document text
    • https://kagojidumone.weebly.com/uploads/1/3/2/7/132740327/vagusebi_pofagigevazes.pdfIn PDF document text
    • https://warogowi.weebly.com/uploads/1/3/1/6/131606132/jogegiwuf_lokunopes.pdfIn PDF document text
    • http://yourlivehelp.com/6787370413460vqo.pdfIn PDF document text
    • http://excschool.ru/etape_culture_du_rizwwah8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tokofom.rf.gd/approaches_to_project_management.pdfIn PDF document text
    • http://dipuxalukogi.rf.gd/81261904555.pdfIn PDF document text
    • http://xatowumo.epizy.com/luzikosepoxepegififekota.pdfIn PDF document text
    • http://kopuperoki.epizy.com/jexasizefemi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ced398b1-9f4a-4f03-ab4d-98fc5b0eae6a/pexerebavuk.pdfIn PDF document text
    • http://rikovinob.epizy.com/dr_martin_luther_king_jr_letter_from_birmingham_jail_summary.pdfIn PDF document text
    • http://vifowas.epizy.com/xusalijalusubi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae0208b9-c857-45f1-9242-0b36dd1cf681/how_to_reset_elkay_water_fountain.pdfIn PDF document text
    • http://zijisulejemam.rf.gd/44417150489.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d2a727f-32c8-4611-a56e-257a391a317e/22095656290.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26613306-5f13-4854-8ad3-b3e585951a5f/probabilidad_y_estadstica_para_ingenieros_sheldon_ross.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_off00010a70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A70 5512 bytes
SHA-256: e334c61a64d9fcab5b12991b02f1ad52936a13924c5a0d876ce8a72ddd68b1a1
font_01_sfnt_off00011d42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D42 13404 bytes
SHA-256: 2995631a3d5be5eaec993c37aef6b5c7926b25f1c308c88aec6e690d87936f72

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