Malicious PDF — malware analysis report

Static analysis result for SHA-256 04b316acf7cdaa3c…

MALICIOUS

PDF

72.0 KB Created: 2021-02-02 06:59:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 5b69e5afea6f1841d9eb3a5fe48a06e4 SHA-1: 7a0a618df1b3333bfb8cfed1d15f09ebdfd68c93 SHA-256: 04b316acf7cdaa3c64eca1a1c983420abee572a53bd909a7a7126fc586e3551d
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://druttle.ru/wb?keyword=kleptocats%20book%202 PDF link annotation
    • https://latelolinowom.weebly.com/uploads/1/3/5/3/135333312/2276937.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466153/normal_600003619fdf9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489595/normal_5febf9f227215.pdfIn PDF document text
    • http://brumbum6.xyz/99224008005kwi7f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457590/normal_5fcf7a503e07c.pdfIn PDF document text
    • https://cdn.sqhk.co/kizafizutuw/5p9dxBK/32575678227.pdfIn PDF document text
    • https://buporinedo.weebly.com/uploads/1/3/4/0/134041533/wigedafidamiva-mewafozit.pdfIn PDF document text
    • https://pudawiwut.weebly.com/uploads/1/3/5/3/135342926/dowaboputufo.pdfIn PDF document text
    • https://cdn.sqhk.co/wunokebewoz/MGjbie1/crazy_racing_for_java.pdfIn PDF document text
    • http://itwow.info/484342356352gds0.pdfIn PDF document text
    • https://venolebibu.weebly.com/uploads/1/3/5/3/135348563/betelonet.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/vezumobigodub/76111147821.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/amazon_orders_history.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/fdic_interagency_appraisal_and_evaluation_guidelines_2010.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/travel_reimbursement_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_off0000da32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA32 5136 bytes
SHA-256: 5f93c7e659d43d8ec6bddad1c0b6b82ef1c8a42edbfb02e85ed4eed4e307beef
font_01_sfnt_off0000ebbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBF 11600 bytes
SHA-256: dc9b78d46a7c9af6bbdef27ea51e343e7fc02ff6036b3b2144703d348a891fa9