Malicious PDF — malware analysis report

Static analysis result for SHA-256 edf7639adfc7e6fe…

MALICIOUS

PDF

85.7 KB Created: 2021-04-05 15:16:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: bf1426c58865ac6fab3092d19500aa6f SHA-1: 58c0c12ecf7bc5957e8f412e8f5a935368494877 SHA-256: edf7639adfc7e6fea1ea6a094a350c943d70a7a5b030cb2847d569afed02f28a
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 0.9995

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://resalured.ru/aws?utm_term=fate+rpg+review PDF link annotation
    • https://nakupibizotan.weebly.com/uploads/1/3/4/7/134730769/7244ece2d3614.pdfIn PDF document text
    • https://cdn.sqhk.co/walamalesumi/gj9BnLu/the_maze_runner_series_by_james_dashner.pdfIn PDF document text
    • https://xexidizufom.weebly.com/uploads/1/3/4/5/134508107/3215874.pdfIn PDF document text
    • https://cdn.sqhk.co/fusajovogi/heqicia/17461027797.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479933/normal_5fc7f18bd66a5.pdfIn PDF document text
    • http://kivolugog.mypressonline.com/introductory_functional_analysis_with_applications_john_wiley.pdfIn PDF document text
    • http://nalodorepuwag.getenjoyment.net/leginilesojazurikudej.pdfIn PDF document text
    • http://punavuvipufov.sportsontheweb.net/lamidopatijefomapedusede.pdfIn PDF document text
    • https://sagolofuba.weebly.com/uploads/1/3/4/8/134873879/zijiru-rilij.pdfIn PDF document text
    • https://cdn.sqhk.co/gilubibawi/plib0gc/64783437785.pdfIn PDF document text
    • http://pikufufunuti.scienceontheweb.net/zenubolerunifaxadobawuwel.pdfIn PDF document text
    • https://podogavefa.weebly.com/uploads/1/3/1/4/131438056/femepalug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530712/normal_5fdae3aabd627.pdfIn PDF document text
    • https://xatevixi.weebly.com/uploads/1/3/4/6/134651360/9226067.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://legokejapo.atwebpages.com/canterbury_tales_free.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/what_is_a_good_healthy_breakfast_with_eggs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c1d2964-d8e3-4f7d-9da3-86fa645f1367/kipukepada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65cfa25a-a33b-4819-94dc-0f345d359ad6/what_is_the_origin_of_etymology.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/tuxadezopolixux.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/bididitoxoruze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21b0d417-72e7-478e-8507-29517bb8e728/85156210900.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/botim_apk_for_windows.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_off0001125c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1125C 4884 bytes
SHA-256: c6d5b0b5b3de2a1d3705aef201be8f2d514f2d38eda9afd9d08d5689ad08b8e5
font_01_sfnt_off00012325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12325 10816 bytes
SHA-256: 462395b36f8f49e3f4ebec3e55f38c4fd645ae9a72b8b2e97cdba0c6b95fd051

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