Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c87a49e86802081…

MALICIOUS

PDF

63.9 KB Created: 2021-01-24 15:47:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 16e58a6e9d6825c01c9ae09a693e2197 SHA-1: 54b4fefac53d4a0f2be4e52f9f3af2acdf8cbac2 SHA-256: 8c87a49e868020819f807f051e3b7b25e0533ae30f11987e7a2dbfaff67dc32b
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=alienware%20desktop%20case PDF link annotation
    • https://venubitolaxi.weebly.com/uploads/1/3/4/3/134372432/f4f3d013914428.pdfIn PDF document text
    • https://weraxugunelega.weebly.com/uploads/1/3/4/7/134719696/guloj-rusosofij-xenemirolurivi-losut.pdfIn PDF document text
    • https://burobedulaku.weebly.com/uploads/1/3/5/2/135299914/zozonurakujafalu.pdfIn PDF document text
    • https://puriruwuz.weebly.com/uploads/1/3/5/3/135395363/2032652.pdfIn PDF document text
    • https://cdn.sqhk.co/tumufiwusifo/Qpghbid/double_impossible_mega_ramp_3d_mod_apk.pdfIn PDF document text
    • http://torchqbfl.fun/family_chantel_recapv5rjc.pdfIn PDF document text
    • https://cdn.sqhk.co/baxijaxazixi/fKgjbie/romantic_ringtones_tamil_download.pdfIn PDF document text
    • https://cdn.sqhk.co/lexebogefaj/3jcVrfK/bright_health_doctors_colorado.pdfIn PDF document text
    • http://copyrightsupport-ig.com/63248031142tf6ko.pdfIn PDF document text
    • https://simebusuf.weebly.com/uploads/1/3/1/4/131406507/zefidavedipuzi.pdfIn PDF document text
    • https://cdn.sqhk.co/ponesigis/iar7jiw/mini_golf_3d_classic_apk.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/dapekufoxiraku/cheap_king_size_fitted_bed_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/9446623012.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/facebook_pixel_installation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/20800867715.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_off0000bd70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD70 5212 bytes
SHA-256: bfadbe99335aba6e3402b467066bf518d0b9966f3fff8531e11e2f4541e45c54
font_01_sfnt_off0000cf4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF4E 10492 bytes
SHA-256: 1138667317fef309c79d20dbaec193fac64b5436192abc4457c109eec55878f4