Malicious PDF — malware analysis report

Static analysis result for SHA-256 a065a8dc5a97227f…

MALICIOUS

PDF

38.2 KB Created: 2020-10-07 05:35:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: f8da773d1ef81729739b7980c8bf7c9e SHA-1: fc937336759e776b1c1d274c1f0e4daeaa71a5aa SHA-256: a065a8dc5a97227fd4ca46c3b5c7c4335cc8cc1056c7b5e03cb7cf6bd0f12123
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://gettraff.ru/pify?keyword=apk+mirror+remote+play In PDF document text
    • https://site-1036823.mozfiles.com/files/1036823/zerosikojufejipuw.pdfIn PDF document text
    • https://site-1037207.mozfiles.com/files/1037207/25969606411.pdfIn PDF document text
    • https://site-1043032.mozfiles.com/files/1043032/makimamubawexamisotogade.pdfIn PDF document text
    • http://gawul.cascadegriffs.com/uploads/1/3/0/9/130969525/kenitapug.pdfIn PDF document text
    • http://jozev.road2gold.net/uploads/1/3/1/3/131382134/robimarabarepadas.pdfIn PDF document text
    • http://files.logosassociatesltd.com/uploads/1/3/0/7/130774990/8c100206a4475b.pdfIn PDF document text
    • http://files.music.shenfieldlearning.com/uploads/1/3/1/4/131437335/2362912.pdfIn PDF document text
    • https://site-1036840.mozfiles.com/files/1036840/30147315443.pdfIn PDF document text
    • https://site-1036783.mozfiles.com/files/1036783/zisawosakokajeli.pdfIn PDF document text
    • https://site-1036840.mozfiles.com/files/1036840/90030771054.pdfIn PDF document text
    • https://site-1038526.mozfiles.com/files/1038526/84113799820.pdfIn PDF document text
    • https://site-1038416.mozfiles.com/files/1038416/69311241010.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000594d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x594D 4940 bytes
SHA-256: d57518784ccb9fab157568318c2277bccb2c2ef79a23a772d7a4929bd3222d13
font_01_sfnt_off00006a0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A0F 10128 bytes
SHA-256: dcf0a12868e9906cb20dca276b4c95a712b095a2d59e75bca4c2a06660c674ed