Malicious PDF — malware analysis report

Static analysis result for SHA-256 286b79f4d659a252…

MALICIOUS

PDF

82.5 KB Created: 2021-04-01 10:35:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5e010daf7582129516d5ee8c15ca0a5d SHA-1: 513301246c068c87d28890e3cc87fdcc53e74eb3 SHA-256: 286b79f4d659a252f5e8860bac3e001b0e353d883fbf26a9d335aa0049f1ef33
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-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://jumiwimov.ru/123?utm_term=baixar+bully+apk+2019 PDF link annotation
    • http://setovewurepenu.22web.org/best_preamp_tubes_for_fender_twin_reverb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487197/normal_6000a320a864c.pdfIn PDF document text
    • http://jidogirikar.mygamesonline.org/biology_notes_form_3.pdfIn PDF document text
    • http://vuzopozakobepe.22web.org/bellarine_secondary_uniforms.pdfIn PDF document text
    • http://geguxejap.22web.org/service_manager_resume_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413563/normal_5fd79133a2204.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456391/normal_601db6c1c6a57.pdfIn PDF document text
    • http://woxagaxizi.22web.org/98722808622.pdfIn PDF document text
    • http://tuzirawejaw.mypressonline.com/66972190096.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb22b2fb-e595-4195-a608-167aa30b9e89/whats_another_word_for_business_alliance.pdfIn PDF document text
    • http://poravilotizeve.epizy.com/3437942976.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75b7c2d2-fe43-4448-9653-b17a0500c3a3/19724282894.pdfIn PDF document text
    • http://kizuwopo.epizy.com/aeronautical_information_services_officer_job_vacancies.pdfIn PDF document text
    • http://vunowowino.epizy.com/62580013816.pdfIn PDF document text
    • http://xonekumoti.rf.gd/67026009717.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/163793db-7b2a-4611-9811-a2224db87a51/cell_phone_cases_for_alcatel_3v.pdfIn PDF document text
    • http://zavukazena.epizy.com/samsung_galaxy_s9_charger_specification.pdfIn PDF document text
    • http://tuwesexo.epizy.com/area_of_parallelogram_worksheet_common_core.pdfIn PDF document text
    • http://kodosalepixalan.epizy.com/tisapogupun.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED45 5540 bytes
SHA-256: 4011c697141bd8e67f7a7777f8406b1da47ac88a0224b1b72b33dd0d95c3ca2b
font_01_sfnt_off0001003c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003C 12408 bytes
SHA-256: 423e608e7858956edbf30b02e28349287777d11aaf7a1513cca309719a6c220a
font_02_sfnt_off000127dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127DC 16076 bytes
SHA-256: 3088de61ba4d2b01ab234d84e40a42107c4d30a52b1b9bdaf8961d49da71d313

Open this report in the interactive analyzer, or submit your own file for analysis.