Malicious PDF — malware analysis report

Static analysis result for SHA-256 e985d78718ffd656…

MALICIOUS

PDF

89.0 KB Created: 2021-04-25 21:05:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6eb35b2b64cb87d8fd7d01f22842c329 SHA-1: 258818c353f53d226fb4fe75943b69372664afbb SHA-256: e985d78718ffd656cb2a715f02c1fd2b847ef5add18f94847a53e1d7fc2c6a62
134 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with one prominent URL being https://mezovuduw.ru/strik?utm_term=wolf+of+wall+street+gif+wife. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/strik?utm_term=wolf+of+wall+street+gif+wife PDF link annotation
    • http://bristol-yalta.run/irony_worksheets_for_high_schooliyckj.pdfIn PDF document text
    • http://thepropheticapp.com/tavinamelokaxererub1vnt7.pdfIn PDF document text
    • http://airned.ru/725010107658wn58.pdfIn PDF document text
    • http://kolejuf.iblogger.org/54570499205.pdfIn PDF document text
    • http://zesonel.22web.org/84952075054.pdfIn PDF document text
    • http://jakor.pro/65128133070bswyj.pdfIn PDF document text
    • http://gakukuketisalum.scienceontheweb.net/whirlpool_washing_machine_repair_centre_in_bangalore.pdfIn PDF document text
    • http://jedilinosur.mywebcommunity.org/86600077560.pdfIn PDF document text
    • http://motorutovibipe.sportsontheweb.net/carrion_crown_shadows_of_gallowspire.pdfIn PDF document text
    • http://ecoservice-vlad.ru/somali_language_books69hvs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jowuwivipi.rf.gd/bitelowogesatutikor.pdfIn PDF document text
    • https://6bb2b61b-82bf-473b-8365-63ddb02ddbdd.filesusr.com/ugd/d55797_362651c41f7346d1b91382c11756068f.pdf?index=trueIn PDF document text
    • https://8ed6bd9f-de2b-4923-b7df-82f95eb18a03.filesusr.com/ugd/7fa32f_b5a288e5b6914f57b6b77745d9805ea7.pdf?index=trueIn PDF document text
    • http://ligoroxenafof.atwebpages.com/xesafesewatejekerulisuk.pdfIn PDF document text
    • http://luvojidepezepag.epizy.com/zilelaxexerorojukupizob.pdfIn PDF document text
    • https://3796e7af-74f6-4269-b4b1-c98d6d9a2df3.filesusr.com/ugd/169b5e_1ac6a1a7f9be4752b529135e5d4255cc.pdf?index=trueIn PDF document text
    • https://a3c35cc3-4a3f-4d41-ab51-8b3e4b114d30.filesusr.com/ugd/2b25b5_b422b7eee0504550b41b2b3ab4b8df92.pdf?index=trueIn PDF document text
    • http://zijedan.atwebpages.com/capsule_general_knowledge_book.pdfIn PDF document text
    • https://a4758657-6aaa-4003-b0f6-1957e800abfd.filesusr.com/ugd/70c1f8_e916dc755a81493f8e592ccc4e273994.pdf?index=trueIn PDF document text
    • http://buvenuf.epizy.com/pmf_vs_cdf_vs.pdfIn PDF document text
    • http://koxowasone.epizy.com/69270276006.pdfIn PDF document text
    • https://4123e755-5e7e-4fb8-b167-49ba90d37259.filesusr.com/ugd/fd3290_d74a6fb3fb46441ca9ca7454fe54756f.pdf?index=trueIn 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_off00011731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11731 5040 bytes
SHA-256: 762278abc83bb9933a4e81ccc0b31ded3f9f98f432f8e1aaf45e759bdff30d63
font_01_sfnt_off00012882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12882 13148 bytes
SHA-256: df8c8232b9f39122225df2977fb2e79beb19e05e820eefb9ad97885c70d21b81

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