Malicious PDF — malware analysis report

Static analysis result for SHA-256 f27796df630c19c1…

MALICIOUS

PDF

63.3 KB Created: 2020-11-23 00:14:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f9190e0e4a8b5284ed41bc8814443aff SHA-1: 7c0c1c95e5c35f2f3314c646e6f0217bc70a69a7 SHA-256: f27796df630c19c11debf1b6355d390d3fafd77f3992935450c702839386e0b7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/123?utm_term=pryor+middle+school+fwb'. This URL is the primary indicator of malicious intent, suggesting the document is designed to lure users to a potentially harmful site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://traffmen.ru/123?utm_term=pryor+middle+school+fwb In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380403/normal_5f8dbf4e9009f.pdfIn PDF document text
    • https://posokiveborog.weebly.com/uploads/1/3/4/5/134584549/9250789.pdfIn PDF document text
    • http://www.okaloosa.k12.fl.us/pryor/AlleIn 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/71508d1b-82b5-4aee-ac6d-70aef25cf1ba/femawerekoverolamomokomut.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/bridge_of_spies_movie_english_subtitles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/884f82f3-3d42-448e-af48-b1b8377d6fa0/inspiron_14_5000_laptop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/711596db-a112-4414-9667-99eb7fc4b780/internet_download_manager_6.28_build_15.rar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/482b7cfb-3abd-4c2a-86be-3fa196a78c80/xedokozunesorafunik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bce8c76-8258-4657-b6ca-f1576b8bca4f/9478227017.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/dopivof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b09b129-7bec-47f7-9739-4064d59682a9/new_years_eve_rituals.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_off0000b961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB961 5384 bytes
SHA-256: 1f177756099a9b885daf4f0c43d07c28f61c1c5c915e85ddf0719f8d2055ce48
font_01_sfnt_off0000cba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA2 10848 bytes
SHA-256: 1451a8edfde300396d115dd8bb6d36cc3257bb3c25409470089e3487c758389b