Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c456b9af6ef9aa4…

MALICIOUS

PDF

40.0 KB Created: 2020-10-05 03:06:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 33d85ffaea0d769d44d3f45f4f81e384 SHA-1: b1bc2e2c83ca37dc9d434f210ad36e04d24b91d0 SHA-256: 1c456b9af6ef9aa45aceaa0d5e83a957923adaea9ce38e659c5352a5158fe54b
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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=aboriginal+culture+essentials+pdf In PDF document text
    • https://site-1037138.mozfiles.com/files/1037138/81042121950.pdfIn PDF document text
    • https://site-1041777.mozfiles.com/files/1041777/feviku.pdfIn PDF document text
    • https://site-1038949.mozfiles.com/files/1038949/segatifepaxupe.pdfIn PDF document text
    • https://site-1037267.mozfiles.com/files/1037267/bupiguzazajulasavalupa.pdfIn PDF document text
    • https://site-1037204.mozfiles.com/files/1037204/fogizebudafusite.pdfIn PDF document text
    • https://site-1038772.mozfiles.com/files/1038772/nobamuvukuj.pdfIn PDF document text
    • https://site-1036744.mozfiles.com/files/1036744/vopidorezesoluzoxal.pdfIn PDF document text
    • http://xapotu.pvnewsguild.org/uploads/1/3/2/8/132816066/11f62e.pdfIn PDF document text
    • http://files.neorestorationalliance.net/uploads/1/3/1/4/131410939/sezoxete.pdfIn PDF document text
    • http://files.nmdnaz.org/uploads/1/3/0/9/130969301/mezojuluwojiz-mesoseto-fanana.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/a0187ca1-8e97-45d8-8715-007387413438/74492987897.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3580f2b-83b3-44d2-b563-522f6eb85244/mumiliju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82c74b62-38e7-45bb-a551-1336a995f977/wixosevawasezivorajelo.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_off00005d55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D55 5452 bytes
SHA-256: 0c8f9748589e309a00372704d92f3e0964acf84ea769545674ac9a4b6baf7b57
font_01_sfnt_off00006fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE8 9924 bytes
SHA-256: 3de7eee5337e2b99b8cf4a62ac90e03eeb8cc14e185e6c8c38bc7589c2842714

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