Malicious PDF — malware analysis report

Static analysis result for SHA-256 c332f56d0a0509ec…

MALICIOUS

PDF

72.8 KB Created: 2021-06-06 02:13:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: dea62db5552ef797b1488ed142bd0cd1 SHA-1: dc76c0afd762d33f9ba611742ee1a7cc06457698 SHA-256: c332f56d0a0509ecfe226932820ae3d564866a9be331d75f92161742c78565ac
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm with numerous external URLs, including one pointing to a potential phishing site related to game cheats. The PDF structure suggests it's designed to redirect users to a network of sites, likely for malware distribution or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://drafthe.ru/pbw?utm_term=apk+day%25C4%25B1+subway+surf+para+hilesi PDF link annotation
    • https://gevivefopunuxaf.weebly.com/uploads/1/3/4/3/134331765/morur_lozuriwesub.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4469841/normal_60b63f36c6114.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494452/normal_603d03543d49d.pdfIn PDF document text
    • https://kexazupaxi.weebly.com/uploads/1/3/3/9/133997339/7636817.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409604/normal_602b3987430a3.pdfIn PDF document text
    • https://gijepunudadolow.weebly.com/uploads/1/3/4/4/134497403/565d804b2da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421339/normal_60384e90d32c1.pdfIn PDF document text
    • https://biditeso.weebly.com/uploads/1/3/4/3/134339176/boxib_geridep.pdfIn PDF document text
    • https://zisojuvamifofe.weebly.com/uploads/1/3/1/3/131383842/kozejixikijurilawodo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472491/normal_605f914d487f4.pdfIn PDF document text
    • https://wivezinafixozut.weebly.com/uploads/1/3/0/9/130969190/3567787.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3afcde26-11fc-4eb3-93ab-bec80d2a8532/42977983402.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9088bf4e-c71c-4870-816e-bd812a5e5063/im_westen_nichts_neues_inhaltsangabe_zu_jedem_kapitel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f19829e-61a4-45b5-a268-a0a0842cfe47/26641936477.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f0b5ebe-f8ef-4bc9-a58a-4843a81b81a5/57978185966.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6900b2d-25e9-4758-bb0d-b5bfb541fe03/javapozuverapafitirep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcf029d4-a497-412a-bc66-099a6e91df8d/post_civil_war_reconstruction_timeline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0cd5766-809c-4dcc-bc2f-c69301d03387/main_hoon_na_movie_watch_online_dailymotion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/603ba47b-d4b3-46f9-9bed-46990b794751/what_does_a_central_processing_technician_do.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b50877f7-e0bb-4fc3-aadf-c4898db4b946/multi_step_equations_with_fractions_worksheet_kuta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b8d4ee9-222d-41c2-8bb1-60c7b9b967f7/16485909998.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_off0000da5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA5C 5548 bytes
SHA-256: 4353c4730ab33a0aa74a94bb0feb4b309bddbbf41eb0abe80842b0aee45b66c8
font_01_sfnt_off0000ed4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4D 12020 bytes
SHA-256: bd1d377133199dbb91f9ee166262faaf28eb0ca53110654ec1b26ffb3addd335