Malicious PDF — malware analysis report

Static analysis result for SHA-256 84c4e6ce95906b15…

MALICIOUS

PDF

43.0 KB Created: 2020-10-20 16:29:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 83ab126b7e303c9f48a410434e54bada SHA-1: 0edb58eec734accab2ca63c46ddf1bc3bab48a7f SHA-256: 84c4e6ce95906b15a9275682565fe96d3732143a8124dcced9fe020c48b8c35d
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://ttraff.me/123?keyword=elementos+del+control+interno+pdf In PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/3856059.pdfIn PDF document text
    • https://welavofewefose.weebly.com/uploads/1/3/0/8/130813025/de3e778f5263.pdfIn PDF document text
    • https://pevinuwipe.weebly.com/uploads/1/3/0/8/130873962/232086.pdfIn PDF document text
    • https://redunexodozik.weebly.com/uploads/1/3/0/8/130814050/011b7.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/rudijodomusefodupij.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/katekalabu-zexebokonoraw-kuvapokagirixob.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/155011.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367922/normal_5f8d535d9b6c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369626/normal_5f888d5b3077c.pdfIn PDF document text
    • https://gewosawoma.weebly.com/uploads/1/3/0/7/130739201/b9cee03b2.pdfIn PDF document text
    • https://lebabipiw.weebly.com/uploads/1/3/0/9/130968925/vepavef-fubuxexid-zisikanifon-zifupipup.pdfIn PDF document text
    • https://wurikosaradusif.weebly.com/uploads/1/3/1/3/131384544/73da14fc.pdfIn PDF document text
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/d8b4f785f.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/363d55ff-bb96-497d-bf57-87841234260b/87538230320.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12a4546b-0f16-4c95-b846-586eab1bc9a1/18024346128.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68b7e88a-4823-40c1-8019-88f97b11bfcd/25035224567.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0604/9442/files/13195717260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/6424/8470/files/cyberpower_ups_825va_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2891/2040/files/83971970205.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_off00006959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6959 5048 bytes
SHA-256: e051b177ef8a0aec8cd1cd99f27b20e7514672b47425ebd05618b728b4b0fad5
font_01_sfnt_off00007a75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A75 11244 bytes
SHA-256: e269903217a6e73eb896255499fa0ca3fa6002083501d37f082c287a2504d850

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