Malicious PDF — malware analysis report

Static analysis result for SHA-256 627e090741af559a…

MALICIOUS

PDF

79.4 KB Created: 2021-03-18 22:57:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: adaa442fc36039421ecf4c6ac4776261 SHA-1: 18653a6a93a96f955784090c75cfb560824f4756 SHA-256: 627e090741af559a6643c37f45b8be88eefbab70c308d1836828f232593be59b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one specifically pointing to 'mezovuduw.ru/award', suggesting a lure to a phishing or malware distribution site. The document's structure and embedded links align with techniques used to disguise malicious content and redirect users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/award?keyword=html+font+color+codes+list+pdf
    • https://cdn-cms.f-static.net/uploads/4444643/normal_600b2f39e29c7.pdf
    • https://static.s123-cdn-static.com/uploads/4476947/normal_5fca2835e59a6.pdf
    • http://linefofaxugedu.mywebcommunity.org/23944135105.pdf
    • http://moxegelubopidi.sportsontheweb.net/cerebral_angiography.pdf
    • http://beviluxenumiliv.mywebcommunity.org/best_python_learning_games.pdf
    • https://cdn.sqhk.co/foropogajag/cgcgd7v/55845104538.pdf
    • https://cdn.sqhk.co/dudokirabog/iicgjeb/belgium_short_stay_visa_application_form.pdf
    • https://static.s123-cdn-static.com/uploads/4381988/normal_5fe0c6307d0a6.pdf
    • http://raxewaponoxiv.mygamesonline.org/moxiwotude.pdf
    • https://cdn-cms.f-static.net/uploads/4484835/normal_604f0d0b303be.pdf
    • https://gekafokolasiga.weebly.com/uploads/1/3/1/3/131384301/c4662.pdf
    • http://lorozetuwivu.medianewsonline.com/88136883849.pdf
    • https://tizemafuniture.weebly.com/uploads/1/3/4/6/134636649/legavilawofinu-zuzumokej-zajanul-buresi.pdf
    • http://mokenolovulonom.medianewsonline.com/gezediwitatem.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://46ebecaa-9490-439b-bba6-ee77f1a6ca93.filesusr.com/ugd/cee8a1_56d57d1f7a8646a1b2800fed9816371c.pdf?index=true
    • http://vawivulumekil.onlinewebshop.net/florida_boat_bill_of_sale.pdf
    • https://14d39b09-fc5f-41c8-84f7-df77690217ed.filesusr.com/ugd/0bcf16_123cea2e06bb4cbdb9499a10d7b4582a.pdf?index=true
    • https://fb4bdcd3-28a3-4206-a6c3-fb267f511c23.filesusr.com/ugd/0ad562_48e69369e3384c21863470fb4585be34.pdf?index=true
    • https://98350ace-7ac4-4f38-a9d9-579fdad8050b.filesusr.com/ugd/9b2d9b_e6fa78e129754c0b97a71ca6b1c218b1.pdf?index=true
    • https://1cf095b7-1d29-4152-b82c-7733cf7ba0c7.filesusr.com/ugd/c1de29_f5910d5526dd4b1e9e0e94bff364434d.pdf?index=true
    • http://pekafujojef.onlinewebshop.net/auditoria_administrativa_de_una_empresa.pdf
    • http://kuxoxokazutuv.myartsonline.com/kelaxu.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_off0000fbbb.bin
282b69c50051203195c1b553a2458fe0396f10c3e2e5730e9da02649b044faf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBB 5052 bytes
font_01_sfnt_off00010cda.bin
2f8183f913c15787ad9887bce19fa54e54aa8d2009aef692731eaf294cdcaa3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDA 10460 bytes

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