Malicious PDF — malware analysis report

Static analysis result for SHA-256 92a3347e9ae084ff…

MALICIOUS

PDF

67.5 KB Created: 2021-06-14 12:00:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c80b277415e7075b89c62473d5d1adfc SHA-1: b24ebe5d746fe5c958c93cdf6cb6215be9ca686a SHA-256: 92a3347e9ae084ff68610aaab32db7aa0c2311c3b4dc3276d52ef8748669135b
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 0.9993

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://dugedepap.ru/123?utm_term=decimal+worksheets+for+grade+7 PDF link annotation
    • https://xulowipel.weebly.com/uploads/1/3/4/5/134594063/3921440.pdfIn PDF document text
    • https://ladofozaser.weebly.com/uploads/1/3/4/3/134334290/4635062.pdfIn PDF document text
    • https://subogepaweb.weebly.com/uploads/1/3/2/3/132302814/wetopijotoko_xofimusasoza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://febamizilaw.pbworks.com/f/620523096.pdfIn PDF document text
    • http://liguduper.pbworks.com/f/quran_abdallah_matroud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a639be37-d429-46de-9703-218bb0d3a60e/22626145190.pdfIn PDF document text
    • http://fozujedax.pbworks.com/f/76569133307.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebafa282-1d32-43b0-8448-fcc6c8048d41/narelo.pdfIn PDF document text
    • http://najapenoz.pbworks.com/f/livro_learn_and_share_in_english_3.pdfIn PDF document text
    • http://tosuvop.pbworks.com/w/file/fetch/144451206/kitab_hadits_al_bukhari.pdfIn PDF document text
    • http://nikekuva.pbworks.com/f/riwotolilikigijejor.pdfIn PDF document text
    • http://zuvuzut.pbworks.com/f/subnautica_admin_commands.pdfIn PDF document text
    • http://wurogakitibe.pbworks.com/f/turavuxozatufegaduko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a55d80cc-c519-414d-b532-f15ee2c38e6c/6128864253.pdfIn PDF document text
    • http://namikikis.pbworks.com/f/sopotifo.pdfIn PDF document text
    • http://jixerumuji.pbworks.com/f/25070429207.pdfIn PDF document text
    • http://visetululiv.pbworks.com/f/26461267398.pdfIn PDF document text
    • http://zafasuvolo.pbworks.com/w/file/fetch/144537312/john_hopkins_antibiotic_guide_2016.pdfIn PDF document text
    • http://kodalomibika.pbworks.com/w/file/fetch/144826371/70816659583.pdfIn PDF document text
    • http://febigadeviti.pbworks.com/w/file/fetch/145116393/ready_player_one_gomovies.pdfIn PDF document text
    • http://lofupevaki.pbworks.com/f/rational_rose_enterprise_edition_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bea41ca-446f-4937-88a7-a12291537ebc/luwatutuwokag.pdfIn PDF document text
    • http://wabajafadi.pbworks.com/f/aquaman_in_isaidub.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_off0000cadc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCADC 5668 bytes
SHA-256: 1fdf6b48c51376f893177bb381aa1912a740199f529087c8030c00c136212843
font_01_sfnt_off0000de14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE14 10136 bytes
SHA-256: 102065ce873cccb2733f2863c26f25427ee13c2a4071253dbdde80a8c4df1021

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