Malicious PDF — malware analysis report

Static analysis result for SHA-256 436da3e3bf670422…

MALICIOUS

PDF

61.7 KB Created: 2020-11-11 02:25:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 11dd517564f27e5dd8b2f595b9cac1b7 SHA-1: 89e941b83ec8e23f388035742a53548951c671b0 SHA-256: 436da3e3bf670422e2e2375ce5f8da2d7771761637a6d09b1cf346482e661591
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/strik?keyword=video+star+iphone+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375076/normal_5f994041db6fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414357/normal_5f97e573ea203.pdfIn PDF document text
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/lamuloganon_zugoxulop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465930/normal_5fa3a3a3d4f0b.pdfIn PDF document text
    • https://tipefejiri.weebly.com/uploads/1/3/0/9/130969755/gasegajefiw_tazol.pdfIn PDF document text
    • https://fepaxumezo.weebly.com/uploads/1/3/4/3/134320712/3403738.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452608/normal_5f9f0fe8f1487.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402936/normal_5f994ce8d6297.pdfIn PDF document text
    • https://pazolumaf.weebly.com/uploads/1/3/4/3/134356568/7543356.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384460/normal_5f9cacec70ab8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nerugiraxura/beginner_witch_guide_poe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0688317b-33a2-4bab-b6f3-21998648a9b3/minolta_spotmeter_f.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/barron_s_sat_subject_test_math.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/zumowevawaxowini.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aa8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA8B 4892 bytes
SHA-256: 473a909d8cc4416ed68436f80e0c1419198445ee29607d022ca10d3d66bfede4
font_01_sfnt_off0000bb31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB31 9648 bytes
SHA-256: 67fcd6ea471b1fa3dea739e47673896a807c5e71303a8a4696da86ac5ba8cd43
font_02_sfnt_off0000dc05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC05 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3