Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dc65612461a64ce…

MALICIOUS

PDF

84.0 KB Created: 2021-05-10 23:32:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: b06c85c8152d26db988cae4606cf5e2f SHA-1: 8caf16d13b73d0494f5e815837745aac205fe5b1 SHA-256: 0dc65612461a64cef6ddb538b62d64f00f4b8631888c402d03333b0df5129fff
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged by ML classifiers and ClamAV as malicious. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a pattern of using many links on disposable hosting, suggesting an attempt to obscure the true malicious destination or to distribute payloads. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://static.s123-cdn-static.com/uploads/4459482/normal_5fceb2fc6f6ec.pdf In PDF document text
    • https://cdn.sqhk.co/bawevabob/eicbhi6/wallpaper_among_us_cool.pdfIn PDF document text
    • https://rejaduwewuwuga.weebly.com/uploads/1/3/1/8/131856140/9274020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371261/normal_6028a7be05506.pdfIn PDF document text
    • https://teseresoj.weebly.com/uploads/1/3/4/6/134644138/taredama-fitafodegesa-vilugumoj.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwadezab/Qhdjaig/73084365542.pdfIn PDF document text
    • http://kobivoweder.mypressonline.com/ncert_mathematics_book_for_class_7.pdfIn PDF document text
    • https://tedotedonux.weebly.com/uploads/1/3/0/7/130775879/1803809.pdfIn PDF document text
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/marani_gajugapifo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401525/normal_5fee3f1a18049.pdfIn PDF document text
    • http://manuximaxemeje.scienceontheweb.net/8854091695.pdfIn PDF document text
    • http://shoppermarket.online/lalawawafumaxiketegigng1jf.pdfIn PDF document text
    • https://netokuwusava.weebly.com/uploads/1/3/4/3/134384506/gakalofaz.pdfIn PDF document text
    • http://nubolats.xyz/xuvajiriwisenezitukegeztwpi1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459479/normal_5ffd3eec89ae6.pdfIn PDF document text
    • http://newsportstechnology.ru/362658717867blzq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/_7yJ53orglQ/wb?keyword=pre%20harvest%20interval%20of%20pesticides%20in%20indiaPDF link annotation
    • http://xinifaduzinuvu.onlinewebshop.net/how_to_easily_find_the_gcf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/187f765f-bb4c-4f03-94b4-8a37cdae69c3/alesis_dm6_usb_kit_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfb0f7ec-7833-4da5-955d-3b906ea35a68/gast_vacuum_pump_rebuild.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d15fe5a-2c51-4224-a8bc-93d9fdf45fa8/5973830796.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_off00010791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10791 5304 bytes
SHA-256: 55b50254d2dca500021c3d13d16d1cffb1a69f11dcd7a82b21f1cf85c497e127
font_01_sfnt_off000119a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A3 11508 bytes
SHA-256: 23347e06195c0f13c2df2580c5e3dcb79769acd753c397d20f1eccae2d261e87

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