Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3306af3bf056295…

MALICIOUS

PDF

70.7 KB Created: 2021-03-30 22:28:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4843169a0ef633cfbbb302058367e225 SHA-1: 93df78b02ff00b679b57a13c2f7152d9ec7e7a46 SHA-256: f3306af3bf0562956af15a43a43cfad8b36be472ad213606a4b2ef25bfa41b8a
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://leonvi.ru/123?utm_term=answers+to+integrated+chinese+workbook PDF link annotation
    • https://cdn.sqhk.co/rolaravez/hjjjifz/sanatorium_movie_trailer.pdfIn PDF document text
    • https://cdn.sqhk.co/reposivekow/tgehfYP/downloadable_swot_template_word.pdfIn PDF document text
    • http://fobegoruf.iblogger.org/nazabevidateg.pdfIn PDF document text
    • https://cdn.sqhk.co/numiwuzuwix/ia4BcK3/61563623796.pdfIn PDF document text
    • https://cdn.sqhk.co/wigatozaduw/fmhhWjd/common_antibiotics_for_dog_skin_infection.pdfIn PDF document text
    • http://kijekidajefi.getenjoyment.net/92147557713.pdfIn PDF document text
    • https://cdn.sqhk.co/numisezopo/figmhcb/91715648998.pdfIn PDF document text
    • https://cdn.sqhk.co/guxifunuris/bgfgeor/kingdom_new_lands_island_2_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/ravusigi/gfY6jeo/fivojur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xogowiv.epizy.com/99775534308.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca9b6ff0-0f0d-473c-a052-1c2fb65075a5/pipax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a50c16ed-f322-4014-9cba-698ba0ec93e9/where_to_invest_in_real_estate_2020_europe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a114ddca-16be-4290-976e-e63f56cc7e19/the_chronicles_of_narnia_the_silver_chair_2020_release_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5b286fb-b7aa-47ac-bb1a-6659d6cae176/how_to_start_a_cake_decorating_class_business.pdfIn PDF document text
    • http://gakuretel.rf.gd/pejaxab.pdfIn PDF document text
    • http://ruronegiseko.atwebpages.com/14372143775.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a2a4d7d-c9d8-4b0d-b804-e741a2ebd76a/nuzujaripefobumagogo.pdfIn PDF document text
    • http://nepopenezum.rf.gd/html_form_input_type_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa1bfdbc-cba8-4674-9efa-1bd376dce62a/cabinet_vision_full_download_crack.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_off0000d6c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C5 5456 bytes
SHA-256: d7c1869d9ec5d86295e361a568c65491401848813499463065579173e9975a11
font_01_sfnt_off0000e95c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95C 10064 bytes
SHA-256: 20a350d33c856ff79653954a52904e7e52615e25ac1ee6571bd89a0561bb3143

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