Malicious PDF — malware analysis report

Static analysis result for SHA-256 a48acc255c12f4f0…

MALICIOUS

PDF

53.9 KB Created: 2020-10-15 23:39:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: bff5a4632f1bc84d107d3d29cc1b5e20 SHA-1: 7108ed7df4a09d8b0bcfe856f8c410a18b6cebaa SHA-256: a48acc255c12f4f06f97572c54d55ca619c1ddb953280d5ad1d57243bcff1a95
132 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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/123?keyword=clear+blue+dual+ovulation+test+instructions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366405/normal_5f8710e848db6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365620/normal_5f874d9911cda.pdfIn PDF document text
    • https://site-1043473.mozfiles.com/files/1043473/34305554456.pdfIn PDF document text
    • https://site-1039212.mozfiles.com/files/1039212/6838063618.pdfIn PDF document text
    • https://site-1043257.mozfiles.com/files/1043257/android_linearlayout_center_horizontal_and_vertical.pdfIn PDF document text
    • https://site-1042511.mozfiles.com/files/1042511/17506679863.pdfIn PDF document text
    • https://site-1037890.mozfiles.com/files/1037890/79481087940.pdfIn PDF document text
    • https://site-1039000.mozfiles.com/files/1039000/42717179660.pdfIn PDF document text
    • https://site-1036685.mozfiles.com/files/1036685/23446769067.pdfIn PDF document text
    • https://site-1038341.mozfiles.com/files/1038341/xilupasedi.pdfIn PDF document text
    • https://site-1038784.mozfiles.com/files/1038784/17985932371.pdfIn PDF document text
    • https://site-1048221.mozfiles.com/files/1048221/53991440923.pdfIn PDF document text
    • https://site-1036651.mozfiles.com/files/1036651/96641016856.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/13f789c1-2200-4a01-b8e5-dc5736270ebb/dumefazipujowukijibenesag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/945bd691-6150-4032-87f9-6646f952a6a4/bawefutapoje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfe04a39-343e-4874-bb7e-95f13b5748a2/jisidi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76817f3d-7080-4021-80c8-ff09093a1e2a/fejufupanipifirasavorup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec25f0f0-c0ad-4ee0-baa7-7b2edfd9949c/tasatozuvevelivev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06bb3794-863b-4960-ad57-221bf683bfca/dutegokubeluwopopofator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c58bf54-35de-48de-b336-16d12dd46560/44253963257.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a09a0e9b-6e78-41db-9d31-7c41538b8717/67773508364.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B36 5036 bytes
SHA-256: 71632ccc1772d5d4807730913d0f9e60f8cf36099c6a7be86a7034638ea5ec87
font_01_sfnt_off00008c60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C60 10008 bytes
SHA-256: d09ba3e90fc60d762669e9514e33cd6e6c1dcc268500d228f2ed5e564c31bb64
font_02_sfnt_off0000aed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAED1 17708 bytes
SHA-256: e93d3aacdc1fd23079e39320b49b5256d74ab07cc981dc522dce64e2e6185287