Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7dfbb7d30d827d8…

MALICIOUS

PDF

39.4 KB Created: 2020-10-08 22:24:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f8e9407f8a3041121f266d8056529c52 SHA-1: ed5a64699dc8200b7a8d9110a64c5d94d8501ba9 SHA-256: d7dfbb7d30d827d80f53787474da423bb69099706fb2da7080ffccc2917125de
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://ggtraff.ru/strik?keyword=book+thief+study+guide In PDF document text
    • http://zidadutar.coastalleadership.net/uploads/1/3/1/4/131407021/golaxij.pdfIn PDF document text
    • http://files.juliakur.com/uploads/1/3/2/7/132740204/d295affba7666e.pdfIn PDF document text
    • http://files.kellyannecostello.com/uploads/1/3/2/6/132695535/645aa92a1a84.pdfIn PDF document text
    • http://rudotew.spotlitekustomaccessories.com/uploads/1/3/1/0/131070450/zodopurilifaw.pdfIn PDF document text
    • https://site-1039852.mozfiles.com/files/1039852/zubixinemigajomoseza.pdfIn PDF document text
    • https://site-1038358.mozfiles.com/files/1038358/jatogo.pdfIn PDF document text
    • https://site-1048205.mozfiles.com/files/1048205/94489470947.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/9c2dcacd-04c8-4504-89d6-bb5307b26b17/89167496448.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8114429-79e0-489f-82db-90b459b1d7b9/72948856363.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11c09a17-99cc-4d8c-94fc-a2bf5a72a27d/viginerexi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b986c701-c22c-4dbb-9dee-6a4317d9c437/nonaregigodazeduzi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b238b1e-eee1-482d-a5b3-2a1c1f70bfff/4673893684.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dee61b8-ab9e-46e2-9c25-60343ad378c9/wudebo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c3bb877-7d6d-49cd-a3f7-530333f02413/40669828703.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_off00005dff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DFF 5044 bytes
SHA-256: 16c394fef31fc7c8ee376c618652634167ee93236dc26ad1ab9e82e4137e58ba
font_01_sfnt_off00006f40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F40 9928 bytes
SHA-256: 36719e0820d3714c9cc6bdc486e81cf9cd1c042a359641f84fb9d96e9727c06f

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