Malicious PDF — malware analysis report

Static analysis result for SHA-256 43c1bc0201ab1dfd…

MALICIOUS

PDF

45.1 KB Created: 2020-10-05 02:59:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 27e2b6af3ade9adff99ada49c761dc1a SHA-1: a63c97aafd850a6e36848e1d9c47a0df31f45104 SHA-256: 43c1bc0201ab1dfd57c9cb4ac9c12fd5bfd67c6056cc7a389d8dcd4c4ce45da3
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=chapter+4+the+human+skeleton+worksheet+answers In PDF document text
    • https://site-1038548.mozfiles.com/files/1038548/87765065456.pdfIn PDF document text
    • https://site-1036880.mozfiles.com/files/1036880/xidivagexubilipojufo.pdfIn PDF document text
    • https://site-1038575.mozfiles.com/files/1038575/tuzuzugotukarawiluv.pdfIn PDF document text
    • https://site-1036869.mozfiles.com/files/1036869/duduzuk.pdfIn PDF document text
    • https://site-1039329.mozfiles.com/files/1039329/60471114247.pdfIn PDF document text
    • https://site-1039421.mozfiles.com/files/1039421/pabirokinatu.pdfIn PDF document text
    • https://site-1036848.mozfiles.com/files/1036848/jopowudodujaruromiju.pdfIn PDF document text
    • http://files.homefromhomechildcarers.co.uk/uploads/1/3/2/6/132681164/moduvixedo-xerujejetekawe-tupavas.pdfIn PDF document text
    • http://bifegofet.fitnessnco.com/uploads/1/3/0/9/130969192/9492520.pdfIn PDF document text
    • http://files.outside-of-the-lines.com/uploads/1/3/0/9/130969813/2808194.pdfIn PDF document text
    • http://files.muziekcursusonline.com/uploads/1/3/0/7/130776529/pofokegitexal_wabesobowe.pdfIn PDF document text
    • http://gojuwez.smokymountaink9sports.com/uploads/1/3/0/7/130775795/ruzabuxud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/596fb78c-c371-405b-b30a-3468c92554e0/remogekanu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ee366b1-3a61-4684-bd70-b250af161996/32102552837.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f050f936-2a31-4a0c-bda1-c723be2dd7bc/86958965514.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2ba55fd-292c-4ff0-8e6a-c77fa6f1f671/wezivazekikeviduxewa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ee41cc4-a3d1-4a06-b3c1-92e39b532e68/ditafasalosasomitejowil.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6457 5160 bytes
SHA-256: cc0757da00ca27561673ac8346d0986d7eaed9ba82cc283562de4c14c62e1ef5
font_01_sfnt_off000075d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75D7 10044 bytes
SHA-256: d97b5b4df9c30a6b6202dd5583f54cfc6cb650d13d2ae9a69c6d841e5750580d
font_02_sfnt_off0000983e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x983E 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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