Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c658f63e8ec5ce5…

MALICIOUS

PDF

70.0 KB Created: 2021-02-21 18:05:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 752e0dbe2920e4fa33cb8537bdadb5de SHA-1: 2e9de0bcb7f2298bb62861d994315ababe18e582 SHA-256: 4c658f63e8ec5ce545db38921cfabfcf9643f4a2250ecacf5d9209a009bfba25
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://baarspo.ru/wix?keyword=vigo+vessel+sink+installation+instructions PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4461219/normal_6001006fc3383.pdfIn PDF document text
    • http://antinomi.design/pojirazoxotipio0wj.pdfIn PDF document text
    • https://nozojotama.weebly.com/uploads/1/3/4/5/134585139/kekukavux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465403/normal_5fcc1a15c4bb0.pdfIn PDF document text
    • https://komamezumef.weebly.com/uploads/1/3/1/3/131398541/zevulazukenonuden.pdfIn PDF document text
    • https://nirasiban.weebly.com/uploads/1/3/4/3/134344158/1770264.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366676/normal_6013c3e536800.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480884/normal_5ffc8e587596d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487201/normal_5feb012e36e70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389581/normal_602c4c8026b0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411480/normal_6026161f45050.pdfIn PDF document text
    • http://verifybadgesbusiness.com/property_damage_report_templaterapea.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/dukexajuj/xewotoxigukopiv.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/how_to_make_calculations_in_excel_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/weather_report_birdland_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/corporate_communication_effective_techniques_for_business.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_off0000d651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD651 5056 bytes
SHA-256: bcdd991840b2fb121c807797f82f307b9350363554ac0ed27fb375a0dbf79f54
font_01_sfnt_off0000e7a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A4 10204 bytes
SHA-256: 825834ba66d770bcc1bcea59172e69a0174d2478ba7581b319b84f99a058a178