Malicious PDF — malware analysis report

Static analysis result for SHA-256 12e05091a4f49dd9…

MALICIOUS

PDF

38.1 KB Created: 2020-10-15 19:20:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 88ed5ea5d46a21ac45ad519e978b73fa SHA-1: e13dafc34ab0653f2f9cbc79b08b48c7b6c00135 SHA-256: 12e05091a4f49dd9391e840600d8e74c04bdcac2bf57cf45576868e1503b68d1
192 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=download+feeding+frenzy+android+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365546/normal_5f8719e74da85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5f886a8e5d01d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369146/normal_5f880442b494c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366344/normal_5f87c4870dad1.pdfIn PDF document text
    • https://wivupenoremew.weebly.com/uploads/1/3/0/7/130775018/9b7b3510645c.pdfIn PDF document text
    • https://karezolakep.weebly.com/uploads/1/3/1/3/131398125/9718492.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/metor.pdfIn PDF document text
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/puvil.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/fibawubaxavuvabu.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/7304884.pdfIn PDF document text
    • https://nagifinapu.weebly.com/uploads/1/3/2/6/132696111/09f5178d2.pdfIn PDF document text
    • https://vevejeda.weebly.com/uploads/1/3/0/7/130776099/9009541.pdfIn PDF document text
    • https://jemiwuwavaza.weebly.com/uploads/1/3/0/8/130814288/tigosorivibisakoxu.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/monirafulowafix.pdfIn PDF document text
    • https://xumogimunosu.weebly.com/uploads/1/3/1/6/131607683/48afb0ac.pdfIn PDF document text
    • https://migirebunimalab.weebly.com/uploads/1/3/1/3/131383914/2aa4e7db4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7471/4784/files/1892322628.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6ef0da9-f22e-4dc8-8130-d34cee2586f5/61279580194.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcc50c4f-efd3-4187-8b04-698154c4648d/66931654767.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72f29997-7b65-4c6b-9f11-cf936a3acb5d/vavibilurogofubajemu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/558f08ec-a6dc-475e-b86e-2aa2351548a3/67005266894.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53012af3-78e2-41fa-9150-4a8de3cdeddb/zexaxutusojeje.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_off000055bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55BC 5336 bytes
SHA-256: 1ce254874a8417b79d0bf6e6abab90009ebfba6a3216e3ce88845bba215abf98
font_01_sfnt_off0000681f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x681F 10256 bytes
SHA-256: db13f17d5491606d70f5a64a01d3b5f91da62dd923a5dbbfeb118cd2a0048624