Malicious PDF — malware analysis report

Static analysis result for SHA-256 b681c1f12ee7d02a…

MALICIOUS

PDF

46.1 KB Created: 2020-10-15 15:35:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 2165b5e87c8ab6d465545971dbe73660 SHA-1: ff124a3b5340b68e343d69df7eacbe2d8be21c4c SHA-256: b681c1f12ee7d02a880663eca0c032b027fa7a2a318a5380192470e28297836f
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://ggtraff.ru/123?keyword=tuner+radio+plus+for+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365636/normal_5f86f46d25d58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367000/normal_5f87a87c48259.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367005/normal_5f872eb06dd97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369311/normal_5f87fcae2eee1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366645/normal_5f874112dff1d.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/zuvekazabuz-topofelo-gupolekodojavo-ponabiloxe.pdfIn PDF document text
    • https://site-1037221.mozfiles.com/files/1037221/gisinuvetuvazo.pdfIn PDF document text
    • https://site-1040990.mozfiles.com/files/1040990/ripukodovegatef.pdfIn PDF document text
    • https://site-1039324.mozfiles.com/files/1039324/gavun.pdfIn PDF document text
    • https://site-1038575.mozfiles.com/files/1038575/mefikufamusesobuso.pdfIn PDF document text
    • https://site-1040347.mozfiles.com/files/1040347/free_speech_therapy_worksheets_for_stroke_victims.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367289/normal_5f87418e1dc55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368781/normal_5f87e09c6354d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368496/normal_5f87dacdb98a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367947/normal_5f87630497067.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f87a850ab77d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/cc43c2ce-067f-4036-9d22-bff5a65dec2b/tobiwubugube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8180772-2f27-45c1-8bb8-0f5c465def07/53889089667.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6990 4784 bytes
SHA-256: 7090ede3db60e5596cfe2721679364a4277f0be6547a1700d263020217322c64
font_01_sfnt_off000079ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79CE 10396 bytes
SHA-256: 7baf73f67a04590a24aff1d685eb65a0a01188e4c6b3192d1ad1acff96f4f6e0
font_02_sfnt_off00009ce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CE3 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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