Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f82152ce1c61241…

MALICIOUS

PDF

38.8 KB Created: 2020-10-05 21:51:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9d1b7ad8f5f8fa2c4db13d04976294b3 SHA-1: b45053e482dab78047e66f016d80dc263dd17325 SHA-256: 8f82152ce1c6124166b0c6bd24cb1ddfeaedcfa71ab67a8758674d530d96fd34
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=bengali+movie+khiladi+2013 In PDF document text
    • http://files.degraffumc.org/uploads/1/3/1/4/131409098/xokokolo_ruxikofo_texube.pdfIn PDF document text
    • http://nomag.fromtheashesidaho.com/uploads/1/3/0/7/130739038/tetul.pdfIn PDF document text
    • http://sefebo.heartsacrossthevalley.com/uploads/1/3/1/3/131380429/1483991.pdfIn PDF document text
    • http://bumeb.cristinamigliorini.com/uploads/1/3/1/6/131636948/sajavirobinu.pdfIn PDF document text
    • https://site-1039266.mozfiles.com/files/1039266/44226207167.pdfIn PDF document text
    • https://site-1044201.mozfiles.com/files/1044201/zimelezarawe.pdfIn PDF document text
    • https://site-1041412.mozfiles.com/files/1041412/37658128834.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/17cf9271-acb7-4973-b8ca-2bc461118e5d/97451869472.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7835117f-59f7-4562-9789-f67f55f47a16/jenatek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9ebdf23-cba5-49cc-bc86-0f2bdaf0f9cc/14030025211.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b88a3d0-8dac-49da-9256-e50f25bd9cf0/xezexukatagikuko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3051582-cd60-44be-8b60-b532fc658a62/2673945812.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3626/9470/files/master_destruction_spells_in_skyrim.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_off000059df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59DF 5628 bytes
SHA-256: a5c9fc7eb736d9e66406f9f1677ec5cef61ab88a06e68e280c91e3822e1c21ae
font_01_sfnt_off00006cf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF8 9800 bytes
SHA-256: 26ce162de7432828b083eaa4c2492031aabea49eed58072857f91b879ee78c69

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