Malicious PDF — malware analysis report

Static analysis result for SHA-256 b25b5df494e2fec0…

MALICIOUS

PDF

43.9 KB Created: 2020-10-09 00:46:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: efd7cc80de06d659d1a79ade1fd20f4c SHA-1: f560ad88608213c781ae385ba9652af90440c61c SHA-256: b25b5df494e2fec056af8e5ae006e11ee95b474b13b0c4d566e2593abbaf7d33
224 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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=how+to+download+google+chrome+on+raspberry+pi+3 In PDF document text
    • https://site-1036812.mozfiles.com/files/1036812/59375418061.pdfIn PDF document text
    • https://site-1041682.mozfiles.com/files/1041682/lejovifodegavawogexovuma.pdfIn PDF document text
    • https://site-1040431.mozfiles.com/files/1040431/23291476173.pdfIn PDF document text
    • https://site-1038725.mozfiles.com/files/1038725/69483442499.pdfIn PDF document text
    • https://site-1036783.mozfiles.com/files/1036783/68917029011.pdfIn PDF document text
    • http://files.mackenzieemievents.com/uploads/1/3/2/7/132741241/f72ed04a.pdfIn PDF document text
    • http://bipotaba.kemsgymanddance.com/uploads/1/3/1/4/131437490/5553729.pdfIn PDF document text
    • http://gesija.seldomimages.com/uploads/1/3/1/8/131856632/952e2afd392c7fe.pdfIn PDF document text
    • http://files.sashazeilig.com/uploads/1/3/0/9/130969151/xopobugoradigov.pdfIn PDF document text
    • http://tilidodit.jennyandgusfood.com/uploads/1/3/2/7/132741066/4d7dc7f6fc.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/6f87dc37-f6a5-4073-9ee5-ecf90f284fd1/votufabunuwikodesemisolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2ef4218-cc8b-49da-870b-4520cb23dcab/91370628056.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c332f981-a5ef-46d7-ada5-be83351f8dbe/putizukariv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1288/0544/files/dibajul.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_off00006971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6971 5948 bytes
SHA-256: 66b7ba4f7f6d91a6281007bef0820bcac793fddba982c9b87810520355c6c185
font_01_sfnt_off00007d95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D95 10628 bytes
SHA-256: c88be63889bd83d20d49fc1f40176f2ac1e44183316f2cc698b92abdfdf10dc3

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