Malicious PDF — malware analysis report

Static analysis result for SHA-256 546a4d4f83837bb9…

MALICIOUS

PDF

81.5 KB Created: 2021-03-29 04:51:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f90b5729843860d3fc119f70535e7863 SHA-1: 9e4b5413b243a2dd2fbe6aa26c6a6ede318881f0 SHA-256: 546a4d4f83837bb9f3b75d45a3e82c83e57cdb722b43e06333ad9aff687608f5
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/award?keyword=character+development+in+blender+2.+5+pdf PDF link annotation
    • https://cdn.sqhk.co/jiloduvunilu/jjPtaig/forever_new_size_guide_uk.pdfIn PDF document text
    • http://diwabivis.22web.org/85444013296.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/haiioQv/guzovufizomimebo.pdfIn PDF document text
    • https://cdn.sqhk.co/jesisuvov/dUApibR/2nd_grade_math_lesson_plans_addition.pdfIn PDF document text
    • http://tomobufefiz.iblogger.org/value_chain_analysis_articles.pdfIn PDF document text
    • https://cdn.sqhk.co/xilasexiki/ghajfiX/knock_down_texture_knife.pdfIn PDF document text
    • http://123dutch.com/70023520284jhgbl.pdfIn PDF document text
    • http://prizinsta365.site/varaloxixubkulfk.pdfIn PDF document text
    • http://copyrightnotice-ig.com/marketing_management_by_philip_kotler_15th_editionalhuv.pdfIn PDF document text
    • http://biweekamnf.com/nuclear_bomb_moviesh4yn7.pdfIn PDF document text
    • https://cdn.sqhk.co/vegedusovo/ddzighj/best_free_mp3_download_sites_2020.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://s3.amazonaws.com/wazorixekunafob/judaai_badlapur_video.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/60199470873.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3b1d99f-1524-43a6-9eba-cc6551732879/dolarireviniwob.pdfIn PDF document text
    • http://mojebevusawibo.rf.gd/70994855206.pdfIn PDF document text
    • http://wadumoseri.rf.gd/ravituwemogulusese.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/lowateliker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc453e4f-ff54-4d29-bea8-b105207c463e/garmin_gpsmap_64s_price_in_malaysia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25682060-de06-4b24-ae22-18042031f182/what_does_farsighted_mean_in_politics.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/61196062356.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_off0000f29c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29C 5516 bytes
SHA-256: fb5ce0bb6ab15eb8c3d782fd3b5695806a8002854b3d16ba5fe0a2149429169a
font_01_sfnt_off00010544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10544 10984 bytes
SHA-256: a1a455109a5c036c90b80c907e2f37968cd831eec0cb04adbc0a072aca12d58e
font_02_sfnt_off00012a6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A6E 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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