Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d81b071b964c4d1…

MALICIOUS

PDF

74.6 KB Created: 2021-01-10 03:25:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-18
MD5: 4b06cd5abfdf0d086d06cc88706f97d2 SHA-1: b8f77b9ec84f50a087bf3147bc76a2c03bcd4996 SHA-256: 5d81b071b964c4d147d6b02190ba627b71d2e2589bf3c1af817f149576111dbf
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wb?keyword=not%20showing%20any%20missed%20calls In PDF document text
    • https://cdn.sqhk.co/sozaxejiv/0awhhmx/ar_3d_animals_list.pdfIn PDF document text
    • https://site-1198644.mozfiles.com/files/1198644/agent_ransack_linux.pdfIn PDF document text
    • https://site-1176782.mozfiles.com/files/1176782/south_actress_wallpaper_free.pdfIn PDF document text
    • https://site-1171954.mozfiles.com/files/1171954/41869325183.pdfIn PDF document text
    • https://site-1171107.mozfiles.com/files/1171107/business_support_manager_duties.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459645/normal_5fa59f6009a03.pdfIn PDF document text
    • https://cdn.sqhk.co/godanalumado/0uj6Ho5/tap_town_hack_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/jekefebiba/OBhcMq9/the_adventures_of_tintin_books_list.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392860/normal_5f9f39d662d1c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/marvelous_designer_patterns_free.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_off0000e736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE736 5420 bytes
SHA-256: b2398b5da054636f762e320009708196d678a7fd3c4d11c31e5b2a468200e1c7
font_01_sfnt_off0000f9a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A1 10580 bytes
SHA-256: 9a54c078bd4d7945d3465413065b09b53a0a6075aefb55b26f4a158de9f53c08