Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2f0994cdf0b2efd…

MALICIOUS

PDF

76.1 KB Created: 2021-03-28 11:10:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: cfe1caf4bb58d3740686bc2f633ba5e2 SHA-1: 5db227a5c2437a0eca614a3405609bdf003123ba SHA-256: e2f0994cdf0b2efd54ba414f40693299d3ca93cfcc4bfbeaf335bcc980e15fe8
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://baarspo.ru/award?keyword=fusionner+pdf+logiciel+gratuit+en+ligne PDF link annotation
    • https://dapalaboz.weebly.com/uploads/1/3/0/8/130874192/rokurovewu_mixaliwanalaz_xopufazudexes_riwiwajedowiz.pdfIn PDF document text
    • https://cdn.sqhk.co/lisakopew/gcgcIKm/transformers_g1_red_alert_toy.pdfIn PDF document text
    • http://pimesizawox.sportsontheweb.net/limorutomogixorodop.pdfIn PDF document text
    • https://sokudepan.weebly.com/uploads/1/3/1/8/131871622/bevefikoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476152/normal_5fe929478878a.pdfIn PDF document text
    • https://vanewuzopawibo.weebly.com/uploads/1/3/0/8/130814706/kegurupe.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/BgfgceC/football_manager_2020_editor_download_epic_games.pdfIn PDF document text
    • http://xunopapazugatar.medianewsonline.com/what_was_the_worst_stock_market_crash_in_history.pdfIn PDF document text
    • http://sevagawos.getenjoyment.net/sefajo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459621/normal_605e166c1db35.pdfIn PDF document text
    • http://wokodanib.getenjoyment.net/erasmus_plus_programme_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421330/normal_5fd2ee5191613.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tokit/9396175420.pdfIn PDF document text
    • http://bubopewufifinov.epizy.com/90330561911.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/how_to_compare_and_contrast_two_pieces_of_art.pdfIn PDF document text
    • http://nosekaj.epizy.com/autoplay_menu_builder_7._1_free.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_off0000e995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE995 5276 bytes
SHA-256: d229414ac391ed545f14de6dffc8bfd80e9582ed25fa6d0e125cc20d532eefdf
font_01_sfnt_off0000fb9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9C 12448 bytes
SHA-256: 67611d539f5cf267ad2864c5e60682b4d8264a78deaa3aea09ba0a532a2f43c5

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