Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebf82e678f574057…

MALICIOUS

PDF

68.1 KB Created: 2021-04-07 05:04:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a25d49dfc44ec256399962a7a8882aa SHA-1: 69a7c2136b6145e938c752171474e5dc0318d2c8 SHA-256: ebf82e678f574057542e6d7c04e6fda237fcfeb1421776fd35c4833594e018df
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to disposable or suspicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution lure, likely leveraging a client-side exploit or redirect to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9417

Heuristics 4

  • 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
  • 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://jumiwimov.ru/award?keyword=baca+novel+ceros+dan+batozar+pdf
    • http://xonigej.mypressonline.com/assam_tet_2020_guide_book.pdf
    • http://gepavozo.mygamesonline.org/poridunijod.pdf
    • http://jivavesomuviz.getenjoyment.net/dictionary_of_accounting_terms_6th_edition.pdf
    • http://fakutuzogazu.sportsontheweb.net/59384660776.pdf
    • https://wapapoda.weebly.com/uploads/1/3/4/5/134581042/c8c8f6.pdf
    • http://delaem-sami.online/15464114622sdv4q.pdf
    • https://cdn.sqhk.co/dabozijide/hjbhqgh/zed_build_mid_s10.pdf
    • https://cdn.sqhk.co/waxobakal/Ojchis3/stats_chat_super_rugby_2020.pdf
    • https://cdn.sqhk.co/mesafovojifo/YvihjvW/78658294725.pdf
    • https://sixumegeb.weebly.com/uploads/1/3/4/4/134476160/konuzatowedab.pdf
    • https://mofutobanu.weebly.com/uploads/1/3/1/3/131383854/65523580a4.pdf
    • http://tabikola.online/86745525355lsbor.pdf
    • https://vodemiteju.weebly.com/uploads/1/3/4/7/134722100/1545993.pdf
    • http://discout.online/6262972135gxcoi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0266cc09-5fcf-4abc-b342-9241ec16d146/how_to_construct_involute_gear_tooth_profile.pdf
    • https://uploads.strikinglycdn.com/files/d13411bf-fbe3-42a6-9aa2-c06894e7fbaa/star_trek_ships_models_for_sale.pdf
    • https://uploads.strikinglycdn.com/files/12a99c2b-1a76-4451-91c7-0f8fbf7e32bd/pexewevunixivu.pdf
    • https://be56f97b-0727-4a8e-a141-4155b83e75ac.filesusr.com/ugd/5034d0_7c0fa9f6c86a43a8bca9a80d5ac8d77e.pdf?index=true
    • https://3e1af3dc-cf37-4f58-935d-0a6065bc5ce9.filesusr.com/ugd/3ca236_9fadba995d064564b0c636b8f5c53e84.pdf?index=true
    • https://c4bedd8b-a3e9-4aa8-9751-a6fde4035b7e.filesusr.com/ugd/037f08_3fcc60a6b15846c5a18b008f4ddc44db.pdf?index=true
    • http://sanojepenot.onlinewebshop.net/brown_bear_what_do_you_see_book.pdf
    • https://1cf095b7-1d29-4152-b82c-7733cf7ba0c7.filesusr.com/ugd/c1de29_796429c8531d4f46a80ab7ba7450bb21.pdf?index=true
    • https://28ae28a3-27cc-4d38-be83-0de1f6925f83.filesusr.com/ugd/454016_8208bc14091640d99f74ecfefeff8766.pdf?index=true
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e28e.bin
5c4232c627569688b18a4d094c09f706a904b8d3db9ae3e4f0a6471f94cd44cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE28E 5448 bytes

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