Malicious PDF — malware analysis report

Static analysis result for SHA-256 953f55305b8d3080…

MALICIOUS

PDF

70.4 KB Created: 2021-01-13 09:48:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 2570787675530468839f050f6583864f SHA-1: 88be446d2c954ba269f412e33a44e3774594209d SHA-256: 953f55305b8d3080694c4576b0ed57efdd1a99bb240b53c40b1f64b57d7167f9
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://traffine.ru/wb?keyword=diaphragm%20function%20video In PDF document text
    • https://cdn.sqhk.co/momewoziwoge/QQDduia/mebulibe.pdfIn PDF document text
    • https://cdn.sqhk.co/feduminaro/hajfRhc/space_requirements_for_bantam_chickens.pdfIn PDF document text
    • https://cdn.sqhk.co/furafurume/MgcMxWw/mini_golf_mini_golf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375199/normal_5fa33d251951d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418764/normal_5ff4eedfeb4a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475741/normal_5fa5b17eec730.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495975/normal_5ffc66361d1b6.pdfIn PDF document text
    • https://cdn.sqhk.co/gudopokobipa/jSYjdih/73161366410.pdfIn PDF document text
    • https://site-1171866.mozfiles.com/files/1171866/lidarapibegejakifa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373248/normal_5fafb45f25453.pdfIn PDF document text
    • https://zafaxaxoxiwowo.weebly.com/uploads/1/3/4/7/134702807/104653.pdfIn PDF document text
    • https://cdn.sqhk.co/malofavu/jjlrTEj/boss_revolution_international_calling_rates.pdfIn PDF document text
    • https://gugajapu.weebly.com/uploads/1/3/5/3/135330564/raxosijenuxilevapu.pdfIn PDF document text
    • https://cdn.sqhk.co/litonesi/myiF8ge/28760570441.pdfIn PDF document text
    • https://cdn.sqhk.co/jiluputumusi/HjZjaRb/zawezufugugojetoza.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_off0000d69b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD69B 5420 bytes
SHA-256: dd72cb3807b0559271daad715af2079ddd94005cd3a4c24441f8d19490227076
font_01_sfnt_off0000e8f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F1 10556 bytes
SHA-256: 01dd02fd3dd0a33877ac2009e5d3d2172fc631990f68cbdda740511befa87969