Malicious PDF — malware analysis report

Static analysis result for SHA-256 568264f88230e8b9…

MALICIOUS

PDF

75.7 KB Created: 2021-04-04 22:19:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b24e5896446a758ce06334d62488221 SHA-1: 7ccac5f7246bf6f94cddff03383f3c8b326ae578 SHA-256: 568264f88230e8b914e7779b24636139a4b62650efd9df62392fb9a575990e17
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or malware distribution attempt. The presence of external URIs and the ML_NYX_PDF_MALICIOUS heuristic strongly indicate malicious intent, likely to redirect the user to a compromised or malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://soxebez.ru/aws?utm_term=how+to+set+up+a+life+coach+business
    • https://turugoduzo.weebly.com/uploads/1/3/0/7/130739986/bapovuvilig.pdf
    • http://muzibatixabu.mypressonline.com/long_john_silver_coupons_family_meal.pdf
    • https://medowiwufaj.weebly.com/uploads/1/3/4/4/134480571/a039944b3cd.pdf
    • https://cdn.sqhk.co/vopupevomate/8PjNYhb/8_ball_pool_hack_unlimited_coins_and_cash.pdf
    • https://cdn-cms.f-static.net/uploads/4368954/normal_603bcba475008.pdf
    • https://cdn-cms.f-static.net/uploads/4454287/normal_5fdb5b2e16726.pdf
    • https://cdn.sqhk.co/ferudati/mKXiehe/sniper_shooter_by_fun_games_for_free.pdf
    • https://vosilidasum.weebly.com/uploads/1/3/2/7/132740263/8812681.pdf
    • https://sazejibapox.weebly.com/uploads/1/3/4/8/134863873/f2b4c3cb9517d.pdf
    • https://xulakuvoloja.weebly.com/uploads/1/3/0/8/130813987/venas.pdf
    • http://timinome.getenjoyment.net/11736342983.pdf
    • https://cdn-cms.f-static.net/uploads/4417525/normal_6010fcc53f9f9.pdf
    • https://cdn.sqhk.co/nobukomorur/gddhjD5/begopeperifojovoro.pdf
    • https://cdn.sqhk.co/sarunasol/8hipNhe/vawubavebolo.pdf
    • https://static.s123-cdn-static.com/uploads/4385417/normal_5ff3b667d3b56.pdf
    • https://felinabaf.weebly.com/uploads/1/3/4/3/134380667/318fc0089f681d6.pdf
    • https://zorimogitew.weebly.com/uploads/1/3/4/4/134487520/2441492.pdf
    • http://fawaxifiwuzodil.scienceontheweb.net/capitalism_without_capital.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2fdee7ec-f31a-4bf3-a418-91fff19cb2bf/electrical_engineering_books_free_download_sites.pdf
    • https://uploads.strikinglycdn.com/files/96e20bdb-6927-46d6-9741-0a24257d770f/basakasonedobodedajim.pdf
    • http://mukanebesiva.atwebpages.com/69379030132.pdf
    • https://uploads.strikinglycdn.com/files/fa9dc6e7-d708-4469-8b86-d127f6cf5d26/mortal_sin_in_the_bible_verse.pdf
    • https://uploads.strikinglycdn.com/files/e3d067c2-8aa2-482b-a4e8-70d915e42b5f/5185649773.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebe3.bin
e45295aeb50d30cedc050c9c744d778b015a652a35a4f99cd858418711a791ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE3 5200 bytes
font_01_sfnt_off0000fda8.bin
325b34a1e59523f9d168602eee5f4811caddee6e9bc81bd84b105d00060bd970		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA8 10308 bytes

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