Malicious PDF — malware analysis report

Static analysis result for SHA-256 30459ec482ab7091…

MALICIOUS

PDF

76.3 KB Created: 2021-03-31 09:29:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da338914dfd135895eff65df92d67824 SHA-1: 17472f4d4aa08e76dc35a9d97c148ca18d0526a6 SHA-256: 30459ec482ab709128d61a14e32c88e425704bc999d647a2d1442a055a5c5828
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. ClamAV detection and ML classification strongly suggest malicious intent. The document body, though heavily obfuscated, contains keywords related to the "Whistleblower and witness protection act 2020", likely a lure to encourage users to click the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://seumenha.ru/award?keyword=whistleblower+and+witness+protection+act+2020+pdf
    • https://static.s123-cdn-static.com/uploads/4469135/normal_5fdd025aca857.pdf
    • https://cdn-cms.f-static.net/uploads/4484355/normal_6011598b16f55.pdf
    • http://xoxapepagaxon.mypressonline.com/bose_soundlink_wireless_manual.pdf
    • https://wejumarokurefa.weebly.com/uploads/1/3/0/7/130776247/5931815.pdf
    • https://static.s123-cdn-static.com/uploads/4376856/normal_5fcbe32565959.pdf
    • https://cdn-cms.f-static.net/uploads/4495043/normal_60134eaf15e61.pdf
    • https://nezozavigarej.weebly.com/uploads/1/3/4/7/134727028/cf7cf73e0f2a40.pdf
    • http://ruwemipuwev.mypressonline.com/45963993775.pdf
    • https://static.s123-cdn-static.com/uploads/4419437/normal_5fe54ece03591.pdf
    • http://dilawiputonu.mypressonline.com/kenmore_high_efficiency_washer_and_dryer.pdf
    • https://cdn-cms.f-static.net/uploads/4382617/normal_6015b49980b3a.pdf
    • http://pekibexuvipeve.scienceontheweb.net/difference_between_capitalism_and_communism.pdf
    • https://cdn-cms.f-static.net/uploads/4421218/normal_5fdb0c1a67e86.pdf
    • https://static.s123-cdn-static.com/uploads/4451353/normal_5fe3b18e7e0bd.pdf
    • http://bagezokazuraw.medianewsonline.com/telecharger_dictionnaire_anglais_francais_gratuit.pdf
    • http://xapowuxif.mywebcommunity.org/dijakipelarufemaj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://9d2e5ffd-2665-450c-83d6-15faf52bb98a.filesusr.com/ugd/be19e1_441f290d58734ee58b1ea38981094d47.pdf?index=true
    • https://a540aa65-2eb1-4ac3-86d0-bf6a54daac96.filesusr.com/ugd/2d797c_eff3673fc75b4e569fb3989a5d818cb0.pdf?index=true
    • http://jugomirusulove.atwebpages.com/antes_de_partir_livro.pdf
    • http://fidegaf.atwebpages.com/vuteterinubob.pdf
    • https://18b09f4e-de4d-4c1b-9fe6-be55c63b1c00.filesusr.com/ugd/cd81e9_ce43fa7872b140b5b23fed6486179bf1.pdf?index=true
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec8b.bin
9c84b15881131466979b2af10f0fee1a7688e5950dc2b1a6221a8be530d55331		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8B 5760 bytes
font_01_sfnt_off00010039.bin
61728427f1635b41d084ab04761f26b7b05fa893314f7521f45c57165030b8a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10039 11140 bytes

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