Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6156f8e75af9789…

MALICIOUS

PDF

46.0 KB Created: 2020-10-04 21:46:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 0473529b70571d8b4973eb978817db3b SHA-1: beac84b46ff4ae09cb3c47cd3e57e3764b520852 SHA-256: f6156f8e75af97891f5537e3255c93ac733d20b0cee1ac8432d3049bd360eed2
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.club/pify?keyword=speak+up+quotes+words In PDF document text
    • http://files.emmasaffywilson.com/uploads/1/3/1/4/131438709/9976500.pdfIn PDF document text
    • http://sufebara.volleyballexperience.net/uploads/1/3/0/9/130969407/giwakevula-rovipegidejolir-buwutuzu-tulowatosef.pdfIn PDF document text
    • http://xirib.dunollycottage.com/uploads/1/3/0/7/130775705/75ab50f646e591e.pdfIn PDF document text
    • http://files.j80na.com/uploads/1/3/2/7/132710719/vokuwoxagazemirowak.pdfIn PDF document text
    • http://vuribopo.press1magazine.com/uploads/1/3/2/8/132814930/5699773.pdfIn PDF document text
    • https://site-1040208.mozfiles.com/files/1040208/sokalazuwijasurubir.pdfIn PDF document text
    • https://site-1039719.mozfiles.com/files/1039719/saloginezavelajoxikut.pdfIn PDF document text
    • https://site-1040322.mozfiles.com/files/1040322/65069386019.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/ba0a4226-d7a2-4de6-8c20-8fa5da1840b2/sivabiveziwujapudabevo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1de03709-3557-4351-8e31-4cfffb647f42/29652497766.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bec6b01-d482-460c-be36-eb8bd9fbe6f9/tijojibiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7837519b-64dd-4c2b-a113-91d250405fe5/xadumop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3316c3d9-e66e-4a6e-95d2-7b284de87b42/65123489305.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/febe405e-d6c2-4fe8-952f-f392740dd852/bojixudojejutunefigira.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28130bf5-3190-4843-82ce-ba087cc13efb/pizomof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5edd4c98-99a1-4b01-a8f1-afd1287e4114/42685514443.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0d24627-5948-45de-ae0a-5aafdf22e7fc/kitulanejatuwatixoxelu.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_off00007485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7485 5308 bytes
SHA-256: 464ab6c8e1e5f3404c811453b0bebde3d106c3dbf931da7cdba2e1ee5084a2e0
font_01_sfnt_off000086b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86B0 10856 bytes
SHA-256: f03e3828a7f52d7c3bcd0ff9ddf842b5c9db550519526caab0388746ba5d9818

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