Malicious PDF — malware analysis report

Static analysis result for SHA-256 d398a7f70bb389ee…

MALICIOUS

PDF

39.3 KB Created: 2020-10-09 01:06:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 6ac8ef9f5ca24d8b01b015c966116b64 SHA-1: de53c1869c447cb0912ff34640b0570969d8fcf7 SHA-256: d398a7f70bb389ee6291e9d5008cba53f1645f3f7aea2c29721850739ef0a24b
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=systems+requirements+lab In PDF document text
    • https://site-1040687.mozfiles.com/files/1040687/nedanepuju.pdfIn PDF document text
    • https://site-1036626.mozfiles.com/files/1036626/57818667940.pdfIn PDF document text
    • https://site-1037115.mozfiles.com/files/1037115/xarom.pdfIn PDF document text
    • https://site-1039675.mozfiles.com/files/1039675/demivena.pdfIn PDF document text
    • https://site-1037069.mozfiles.com/files/1037069/31745685496.pdfIn PDF document text
    • http://files.frederickeastclassical.com/uploads/1/3/0/9/130969254/64e55e12ec.pdfIn PDF document text
    • http://files.groundedcoffeestore.com/uploads/1/3/0/8/130874139/3929a79d528.pdfIn PDF document text
    • http://files.danhanes.com/uploads/1/3/2/6/132681464/zenezogigotadap-tajazajelubaf.pdfIn PDF document text
    • https://site-1037166.mozfiles.com/files/1037166/mirupajodoxujibuviki.pdfIn PDF document text
    • https://site-1043829.mozfiles.com/files/1043829/pojitumaginosas.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_off00005be6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE6 5304 bytes
SHA-256: a2f748fd92ddf930ee67ff1a074877dbd88f897dc9ef7ef3e7a637883deef9cd
font_01_sfnt_off00006de1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE1 10328 bytes
SHA-256: 06ac7d3eed730ea9a894e089da5818752f0e41e740fadba377ce318f23ddeb45