Malicious PDF — malware analysis report

Static analysis result for SHA-256 64bcdc3d6306f4c9…

MALICIOUS

PDF

64.2 KB Created: 2021-01-26 19:48:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f1b6cba0deda2261becf528a393305ac SHA-1: 7767dc3001c42a0a76105d777e2346dd92e589cc SHA-256: 64bcdc3d6306f4c9f0b09c005e825ba36f8a32393a8239f63dd68f48c1ffd151
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wb?keyword=color%20bump%203d%20ball PDF link annotation
    • https://senajadodum.weebly.com/uploads/1/3/1/3/131379015/b949fe12754d2cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422897/normal_5fc97b50e75e0.pdfIn PDF document text
    • https://polabobaxadujo.weebly.com/uploads/1/3/4/7/134775235/folodepado-rogekolile.pdfIn PDF document text
    • https://gajifawegux.weebly.com/uploads/1/3/4/6/134649352/ladevu.pdfIn PDF document text
    • https://ferofetilusef.weebly.com/uploads/1/3/5/3/135346026/ruvajimonan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://popeganezawojeg.rf.gd/chunari_chunari_video_gana.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/search_console_api_google_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/nursing_prioritization_delegation_and_assignment.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/jalujibunemipurovomoroxox.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/8585481791.pdfIn PDF document text
    • http://sizixezaratog.rf.gd/lessons_learned_template_examples_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/voice_note_recorder_for_pc_free.pdfIn PDF document text
    • http://lisuxuzilim.epizy.com/factsheet_five_archive.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/lose_yourself_instrumental.pdfIn PDF document text
    • http://verirajoxa.epizy.com/83498462241.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_off0000bf76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF76 5136 bytes
SHA-256: 9f467e4b5c4f44ebd72953a88459d76b386589c9284e49cbe9cfdf277e62aac8
font_01_sfnt_off0000d0c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C7 11320 bytes
SHA-256: 1125b1663b7bd2c6b888454e2b436ab5767c0091eb14e9e49fa5e58b9ac84972