Malicious PDF — malware analysis report

Static analysis result for SHA-256 4151c4ca6e89e979…

MALICIOUS

PDF

68.6 KB Created: 2021-03-01 10:48:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 399cdc531f6724f0249fb7d9c44e2416 SHA-1: 3e1813a63ce86f2b40aef5fb37932b3f96c60cba SHA-256: 4151c4ca6e89e979e14c0360c39f8213d23ec2d9d8c59857b77fce14b51d9123
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://xajibur.ru/award?keyword=what+is+a+good+lexile+range+for+a+9th+grader PDF link annotation
    • https://cdn.sqhk.co/dexasubu/jbNl8wI/ps_remote_play_download_pc.pdfIn PDF document text
    • https://vipamabukaxeban.weebly.com/uploads/1/3/0/8/130874648/gesulosubebem.pdfIn PDF document text
    • https://cdn.sqhk.co/kupujape/vehgja1/63301422960.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411490/normal_602815a8501ef.pdfIn PDF document text
    • https://cdn.sqhk.co/votezevon/jjEgfDF/kuledawubu.pdfIn PDF document text
    • http://termometr-medikal.site/flexisign_pro_torrent5k92x.pdfIn PDF document text
    • http://ehaberdevlet.com/why_does_inbreeding_cause_problemsmk0sk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457311/normal_6018621adc777.pdfIn PDF document text
    • https://cdn.sqhk.co/dovawowo/jhRggic/heroines_fantasy_ios.pdfIn PDF document text
    • http://wonder-ita.space/nursing_drug_handbook_2015_free_downloadvzpq7.pdfIn PDF document text
    • https://cdn.sqhk.co/vumuwilaj/iegij6l/burnished_suede_cafe_racer_jacket.pdfIn PDF document text
    • https://cdn.sqhk.co/dijabidasu/Wichehc/95603563238.pdfIn PDF document text
    • https://cdn.sqhk.co/vumuwuxa/Z934gem/40139054571.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/bejokazemur/agrarian_reforms_in_indian_law.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/fopigufometiwum.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/41822304946.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/dynamic_tension_workout_routine.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/ts_eamcet_hall_ticket_2019_date.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_off0000cf95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF95 5408 bytes
SHA-256: 3cb2a4424fe36211dc336e240d2b4022063b6b6f76a4c97dfab76546a9e8f87e
font_01_sfnt_off0000e200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE200 10256 bytes
SHA-256: 2a08436800b51148651c41af376bb4de75ef6145ef7632f630a03de9755c9fcc

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