Malicious PDF — malware analysis report

Static analysis result for SHA-256 3947fa01735bc1ac…

MALICIOUS

PDF

88.1 KB Created: 2021-06-14 04:19:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 4204d3af79e09f4d6b082cb85fe7a188 SHA-1: ce9adda559fadff7941c4bc4de2930c33d24d83a SHA-256: 3947fa01735bc1ac7bfb5e75bffc0d207c2ab65f6902ab5c80c69aeb1feb90a1
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high concentration on disposable hosting, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution lure, likely leveraging social engineering by embedding seemingly relevant search terms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://catamma.ru/pbw?utm_term=agneepath+picture+amitabh+bachchan+ki PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368477/normal_5fcdd07974f73.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4387412/normal_60b092326a049.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444877/normal_5feba7dc727d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420239/normal_60505d6d4d079.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374518/normal_60471c537aca2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381751/normal_601dca08125f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366354/normal_5fd14676ab06f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415768/normal_5ff3a445ae03a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421366/normal_60271ec575e1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392470/normal_602b2bc2a921f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471692/normal_5fe33a8a551f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417813/normal_5fd6c58a561de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421957/normal_60c6784d1908d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375353/normal_5ffb13a85ab69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367311/normal_5fe7532992dc6.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4422658/normal_60b5fcd3c0404.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b77163c-ae31-4164-98f5-0c509eccf8a0/xipeziwudewugirej.pdfIn PDF document text
    • http://tereburokofe.pbworks.com/f/hz_mer_dizisi_turkce_dublaj_izle.pdfIn PDF document text
    • http://jilawuxifi.pbworks.com/w/file/fetch/144551448/ziriwaxubonikeva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e63b860a-0d0d-4202-9d0b-b13c83508eea/which_wifi_extender_works_with_verizon_fios_router.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bfdbfbf-817a-4b56-8c5a-08692eefe381/mivawisododevupum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c375bcba-bdab-4c7e-a78b-95096706ed0d/turbotax_simple_tax_return_for_stimulus_check.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80ef5112-e921-4949-84f6-4aaef67171e0/jexurusavaweg.pdfIn PDF document text
    • http://rasetewi.pbworks.com/f/jijorikemo.pdfIn PDF document text
    • http://nagomax.pbworks.com/f/91002820468.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA90 4064 bytes
SHA-256: ec16de72119e42f7114df4566868d28e8c104a6b21ffb1da653cff8c5a1f89cd
font_01_sfnt_off0000f90a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90A 5328 bytes
SHA-256: 092c3f569a24a5725cce1894cd4f1699fb2466a4e946859b8f0b0615121086a8
font_02_sfnt_off00010b03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B03 11232 bytes
SHA-256: 9640b0e331cc2fc98939b4d2d287dd075886fa93f00d673b8157ee1c5e2d8c8f
font_03_sfnt_off00013158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13158 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449
font_04_sfnt_off000146c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146C3 3060 bytes
SHA-256: 8360b1c51be3c6b9a7f1f7c5f490bd511d624ef88f682cad513a104a48695a6a

Open this report in the interactive analyzer, or submit your own file for analysis.