Malicious PDF — malware analysis report

Static analysis result for SHA-256 1573bba2a36d7746…

MALICIOUS

PDF

48.3 KB Created: 2020-10-10 00:28:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 53dba3b8adcedd8c79dc32440505d593 SHA-1: e9f4ea4db357d7514f3208d60856dc8ce0239333 SHA-256: 1573bba2a36d77460011055cf85880f810e70b23ab809dd00765010c3196cd26
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://cctraff.ru/strik?keyword=unblocked+rap+music+2019 In PDF document text
    • http://files.enzoarticulator.com/uploads/1/3/1/8/131871621/b618db0cca5.pdfIn PDF document text
    • http://luzepukag.deliveredvessels.org/uploads/1/3/0/7/130775537/3613682.pdfIn PDF document text
    • http://files.madmaggy.com/uploads/1/3/1/8/131871984/vedawaba.pdfIn PDF document text
    • http://files.hillsidebiblechurch.net/uploads/1/3/1/6/131637854/91fbf7c30e4dc6.pdfIn PDF document text
    • http://mojobigu.nhca-lions.org/uploads/1/3/2/6/132695424/ganit-vuziworo-wugomusudaris.pdfIn PDF document text
    • http://files.assiniboiaartscouncil.ca/uploads/1/3/0/7/130738814/9c18947e.pdfIn PDF document text
    • http://files.skipworthinsurance.com/uploads/1/3/0/8/130814232/7325349.pdfIn PDF document text
    • http://files.jjeducationalcenter.com/uploads/1/3/1/4/131453226/8333638.pdfIn PDF document text
    • http://files.talentcitiesvista.com/uploads/1/3/2/6/132682897/563983.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5732/7521/files/a_souls_bane_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/4089/1029/files/nugoboxetaxosesifexujup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69032976-35a5-42b5-9027-67d74fe583c7/75331188973.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc00b81b-f59d-4b8b-a3cb-ebabec9b4dac/28536233611.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97cd58c2-841e-4a2b-8dd5-f0caf2a57e57/33718663032.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83aa4668-79e3-468f-a901-f79d63e969f7/sodotedidokujurifirovid.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000096ce.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x96CE 17892 bytes
SHA-256: aa613c6161feaf940d7f4cc8de5cbab3ce250a6a1634b634e5c6a2ec3fa8a9ff
font_00_sfnt_off0000526d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x526D 5896 bytes
SHA-256: 763e2fc2ccf7ed5b909dd08831bc792a82c434959c46b8c86cefd99a457d083e
font_01_sfnt_off00006665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6665 15652 bytes
SHA-256: d94d8d4f033bd723102e282561231cbf63e0c45cfeda91029af13f51478535a4

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