Malicious PDF — malware analysis report

Static analysis result for SHA-256 32cdf19e9cfbacdc…

MALICIOUS

PDF

40.2 KB Created: 2020-10-03 04:45:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 3ad1b797681484ea8edf7b845baadb07 SHA-1: 253036ace8c84d91412b8d82fb4ce545697fbe7e SHA-256: 32cdf19e9cfbacdcb1cffcc96d1c96d0734e2b69effdffb6dcc2180e7f7b2252
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://cctraff.ru/strik?keyword=shooting+games++unblocked In PDF document text
    • https://site-1039307.mozfiles.com/files/1039307/jaratuw.pdfIn PDF document text
    • https://site-1036830.mozfiles.com/files/1036830/77839635373.pdfIn PDF document text
    • https://site-1037188.mozfiles.com/files/1037188/jipej.pdfIn PDF document text
    • https://site-1037265.mozfiles.com/files/1037265/3122119162.pdfIn PDF document text
    • https://site-1036946.mozfiles.com/files/1036946/wafunawivinopa.pdfIn PDF document text
    • http://files.avian.dk/uploads/1/3/1/0/131070712/9947131.pdfIn PDF document text
    • http://files.coachcarterllc.com/uploads/1/3/2/6/132695799/voponuminiragot.pdfIn PDF document text
    • http://files.rs401k.com/uploads/1/3/1/4/131406413/6456394.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/1/0483/8509/7877/files/why_is_photosynthesis_an_anaerobic_process.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2892/7896/files/vehicle_document_alert_notice_scam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7129/9999/files/sun_city_peachtree.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0140/8417/files/reflections_5th_grade_social_studies.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_off00005f1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F1F 5564 bytes
SHA-256: 139617aac07eba46dabf6f821f4e9326de781f3eab6b4692ecbbebf9a39547e7
font_01_sfnt_off000071e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71E4 10136 bytes
SHA-256: 9361c82e394b7962a700d51ad8889e7561e35f4161e9c0f860378b6ba4331821