Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc5377665d403bb8…

MALICIOUS

PDF

67.6 KB Created: 2021-02-14 20:21:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 33d415413b8d8591959587082a731f51 SHA-1: 146223470aad46297e681d38ec9f7850b12f00e7 SHA-256: bc5377665d403bb8f9a8f98ea6b96600454fdff4db843becffea834ac6af806f
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://druttle.ru/wb?keyword=best%20android%20biometric%20fingerprint%20scanner PDF link annotation
    • http://xijilufaligamox.22web.org/38531490774.pdfIn PDF document text
    • https://sabutiwageb.weebly.com/uploads/1/3/5/9/135992853/dodeguzamorub_lidimalu_mavomunug.pdfIn PDF document text
    • http://pufegusikozig.22web.org/48368759263.pdfIn PDF document text
    • http://kujotisokuvo.iblogger.org/votowexifukilugo.pdfIn PDF document text
    • https://lofokuvowuvi.weebly.com/uploads/1/3/4/3/134362742/9600762.pdfIn PDF document text
    • https://wifusudufasebo.weebly.com/uploads/1/3/5/9/135992472/5dc41.pdfIn PDF document text
    • https://derufobi.weebly.com/uploads/1/3/2/6/132682106/4e2e848.pdfIn PDF document text
    • http://chempion.coffee/table_tennis_racket_bag_priceyaw9r.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/zabejuvijolu/adivasi_gana_song_dj.pdfIn PDF document text
    • http://fakipewoze.rf.gd/tatokegenitilanulukeb.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/ftc_buyers_guide_fillable.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/birujexezu.pdfIn PDF document text
    • http://nonulalomijowo.epizy.com/64758288713.pdfIn PDF document text
    • http://sogisujomixugo.epizy.com/abnormal_psychology_textbook_7th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/sql_injection_cheat_sheet_list.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_off0000cb05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB05 5632 bytes
SHA-256: 4c63f4821ddb29c5233eaf7cd58e911de72573ae22ecd7a91b9d6a27744f31c6
font_01_sfnt_off0000de1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1A 10368 bytes
SHA-256: e1738af55fb65c0109a6d83ccf4e796789bb075d88e8ffc2ab4317d3713271c5