Malicious PDF — malware analysis report

Static analysis result for SHA-256 da00ccc427a24fe7…

MALICIOUS

PDF

42.3 KB Created: 2020-10-18 19:33:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 4034187ecc54acdbeed6ba6da79379c1 SHA-1: 669a3f956bc164f41fb695682ff7ced3e9ab33a8 SHA-256: da00ccc427a24fe79cb971dbdb7062fb4febef2770dc8fd6e6bf639fe34d4339
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ttraff.com/123?keyword=english+cloze+test+for+ibps+clerk+pdf In PDF document text
    • https://dosaremuxabibi.weebly.com/uploads/1/3/0/7/130739916/7760815.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ratot_muweliwamopoj.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/velowo_dakemolaku.pdfIn PDF document text
    • https://vuxilimibipemop.weebly.com/uploads/1/3/1/4/131453056/8633885.pdfIn PDF document text
    • https://gidixelasulam.weebly.com/uploads/1/3/0/7/130739099/jodajikafewaberuxa.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/1d1f8ecc085ca.pdfIn PDF document text
    • https://dokodajibebabek.weebly.com/uploads/1/3/2/3/132302773/tiliradikeba_zevixovi_kotaxawipezemej_boxuk.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/bilorezelilawu_kekepi_ruvazevi_tukiriz.pdfIn PDF document text
    • https://dojulukasinu.weebly.com/uploads/1/3/0/7/130776790/gupabetize_poxejumaka_winakumin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369163/normal_5f8892546f9d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370319/normal_5f89b44d17535.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/govorikepudago-gixidawele-wawep-xoxebilepadevu.pdfIn PDF document text
    • https://jemiwuwavaza.weebly.com/uploads/1/3/0/8/130814288/bibesekukemugedovofa.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/zanadutut_wexudafenatogun_jetomefoja.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/40df6db7-79f6-48a5-9d74-191781a6da5a/sumuza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/736628e0-8dab-4d37-9a45-1414fa3a0574/28864077998.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c80881d3-5d60-42be-a878-5223c928c627/gitiresijaxorivarovawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41e3e064-19a2-4eb2-a8a5-d3040a37d4b1/xonijatuvepeguwawos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd999265-9537-4d9e-b99c-e67b571bc14d/zirige.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_off00006709.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6709 5420 bytes
SHA-256: 2344a90e86b475649814aaf84158647cc6104c6951b6acdf14f5daeabb181de5
font_01_sfnt_off00007974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7974 10200 bytes
SHA-256: b36dc1371689cbe49e3e26547c3fd7c73d8eeff8f90fe8d218f9cad5869eb835