Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1758ccb6686a83e…

MALICIOUS

PDF

74.4 KB Created: 2021-02-08 23:47:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 97a62b9072f21142436370aadf6a6439 SHA-1: 32f4d88f9543026d2110b70ad614b9bfa47be505 SHA-256: b1758ccb6686a83e0823aa3ef9401304d9502d6e012e7106087c91b75346eacf
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://baarspo.ru/aws?utm_term=amazing+spider+man+2+system+requirements+android PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450728/normal_5fe1980cae16d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496380/normal_5ffba6e76e5d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425492/normal_5ff6b965b1e51.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472188/normal_5fef11562e83d.pdfIn PDF document text
    • https://cdn.sqhk.co/kelulegawi/paBXgfM/assalamu_alayka_mp3_offline_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452593/normal_5ff227c140a33.pdfIn PDF document text
    • http://texewofe.22web.org/bitdefender_gravityzone_install_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446937/normal_5ffae5fa9a2ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465000/normal_600f07ae1e641.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463543/normal_600004cf819a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466661/normal_5fd83855d58d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418166/normal_60182c8a2b638.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416811/normal_601d54ba8283b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vuvumotelikev.rf.gd/latajikudifupifokuza.pdfIn PDF document text
    • http://vonubopoz.rf.gd/google_documents_invoice_template.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_off0000e5d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D5 5644 bytes
SHA-256: 4af6c14c0ce4a60c827793d66c1f575d02f66676905768e34223a620ffb7adf6
font_01_sfnt_off0000f8f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F6 10584 bytes
SHA-256: beeb0e552ee895cca812c1b0e7e5ce732b0f18273aa442fac0f4cb992c8d41f4