Malicious PDF — malware analysis report

Static analysis result for SHA-256 5faa0c2a7300c259…

MALICIOUS

PDF

80.7 KB Created: 2021-03-20 13:52:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 192aa46e2a6e4805f2bf0b6e4cc20e19 SHA-1: 1995c3822f1881d0bf3638bb8570b344c4ba9038 SHA-256: 5faa0c2a7300c259aed86ae87ba3c8e5d691b63e58b01cb9b7de931d38cfdefa
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document's primary purpose is to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/wix?keyword=combined+gas+law+practice+answer+key PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4500453/normal_5fc68b20a25b0.pdfIn PDF document text
    • https://pepakulal.weebly.com/uploads/1/3/4/8/134885681/1cae7fa2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450154/normal_5fd3d70357617.pdfIn PDF document text
    • https://pawiwojofidinof.weebly.com/uploads/1/3/4/4/134458390/5167444.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392207/normal_5fe58f6a2cde4.pdfIn PDF document text
    • https://makaxifosezopuv.weebly.com/uploads/1/3/4/5/134511124/2302038.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472793/normal_60390dcca93f9.pdfIn PDF document text
    • https://banafovogakake.weebly.com/uploads/1/3/5/3/135326552/887c151e4de98ee.pdfIn PDF document text
    • https://lopamazaveseku.weebly.com/uploads/1/3/4/6/134643240/2240a90c.pdfIn PDF document text
    • https://paxedobopesenun.weebly.com/uploads/1/3/1/3/131398064/7989334.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/excel_spreadsheet_free_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/zijukezisoseni.pdfIn PDF document text
    • http://nivefozug.rf.gd/81963846079.pdfIn PDF document text
    • http://dufovufozotetan.epizy.com/on_the_attendance_worksheet_in_l5.pdfIn PDF document text
    • http://gonidiwofove.epizy.com/biology_oxford_dictionary.pdfIn PDF document text
    • http://lukugebov.rf.gd/aprendizaje_significativo_que_es.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/kafefekekepexexebidenukol.pdfIn PDF document text
    • http://rifobotulaw.rf.gd/corsair_k95_platinum_xt_vs_k100.pdfIn PDF document text
    • http://nukasero.epizy.com/statutory_declaration_form_template_wa.pdfIn PDF document text
    • http://woxutonugosafer.epizy.com/79193715623.pdfIn PDF document text
    • http://lunagibaludoze.epizy.com/newenulunanuxo.pdfIn 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_off0000fb3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3E 5696 bytes
SHA-256: 4115e31893f2844ce96e1607d58c2fcbb3b9d23aca7ce8190f855984b10db6e4
font_01_sfnt_off00010e9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9C 11160 bytes
SHA-256: ad131dc32ba87ed5c9b413305291955f72a9c89e1ffcddc1c71514379f71bc3d

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