Malicious PDF — malware analysis report

Static analysis result for SHA-256 6498ad04aea2d33f…

MALICIOUS

PDF

68.8 KB Created: 2021-01-19 06:53:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: d27a54f066af98e2d3733032c632148a SHA-1: c3d21f838faa11891e37eb96f36ec06aff28800e SHA-256: 6498ad04aea2d33f2f2045404cf251dd19d6e50b1290454dc200fa6bf4ed983c
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/123?utm_term=funny+anime+faces PDF link annotation
    • http://waliwijufe.iblogger.org/ketuwetuvidunowelukawo.pdfIn PDF document text
    • http://zamuxodub.22web.org/alveoli_are_formed_from_what_tissue.pdfIn PDF document text
    • http://bubuwem.iblogger.org/72397955472.pdfIn PDF document text
    • https://vavuxajibibugu.weebly.com/uploads/1/3/4/4/134472661/nikepu.pdfIn PDF document text
    • https://jubuxazule.weebly.com/uploads/1/3/4/5/134585976/fudomiwumesomozetav.pdfIn PDF document text
    • https://lokejefu.weebly.com/uploads/1/3/5/3/135301848/fetinowij-jozubusiw.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/sabegokek/14958799097.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/41639081047.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/twin_bed_sheet_sets_sale.pdfIn PDF document text
    • http://zaxutakizet.epizy.com/48160788976.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/52423158743.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/53234007358.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/21928239805.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/crazy_train_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/job_work_challan_format.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_off0000d243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD243 4956 bytes
SHA-256: dc323da3bd702c59e09eb48e54d6b7b00d23374e5f5f67692a17e328ae44a177
font_01_sfnt_off0000e324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE324 10552 bytes
SHA-256: d8e70079025405d22605c332f5df15385144ca41a255aae11b4850300cbeb7df