Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b63907d680f6161…

MALICIOUS

PDF

82.1 KB Created: 2021-02-25 17:47:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 7fd5035519895b76cd9b80e7f89610cb SHA-1: 9d252594c17b3af802fd5790f77588d41aebdd4a SHA-256: 5b63907d680f6161e9d7194035040a823fe3efa435af9a2ee890e282789e9d3e
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://yafferge.ru/award?keyword=a+confederacy+of+dunces+ignatius+character In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383912/normal_602ac37e90f92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390081/normal_5fd1efc51b6eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414489/normal_602da70e16438.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446280/normal_5fd375fce3b15.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469104/normal_5fc96924d1c46.pdfIn PDF document text
    • http://idealica-ordina.site/xixederutovawerarofapenpicy.pdfIn PDF document text
    • http://termometr-medikal.site/59764909205t8ai5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456998/normal_5ff57ae14092d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450147/normal_60244f9f9844b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378606/normal_60046e71da36f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473651/normal_600a9d701a149.pdfIn PDF document text
    • http://winoraama.fun/trader_joes_frozen_turkey_burgers_cooking_instructions82rxx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mojadifo.rf.gd/mandated_reporting_pa_training.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/20879944531.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/jekanamadetod.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_off0001058e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1058E 5340 bytes
SHA-256: cf22fd7458d0a8c7156bc3e694f5cb2d9309e72af582bf80a049bd58504aae41
font_01_sfnt_off000117c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C0 10440 bytes
SHA-256: c168da551c03f2e7cb1ceeb5ec0d46e502602978e3c2b2a5d5399b4f9b2d4b07