Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdf67dd647c1e75b…

MALICIOUS

PDF

71.4 KB Created: 2021-02-28 11:33:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 0a272301dc095d63d6af032d5492aec9 SHA-1: acfc9b27ab51aee7bc97d714408fe0934880762a SHA-256: bdf67dd647c1e75b2eab766ee707760f30c31eb25181e577d0743380370cfc4c
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/wb?keyword=my%20cousin%20rachel PDF link annotation
    • http://nejamaranidirit.22web.org/instagram_black_theme_mod_apk.pdfIn PDF document text
    • http://dalidusiz.mywebcommunity.org/rutefozezapikadewe.pdfIn PDF document text
    • http://ronifibofizet.medianewsonline.com/zidonos.pdfIn PDF document text
    • https://tebojejuket.weebly.com/uploads/1/3/4/7/134764489/dd0d1d.pdfIn PDF document text
    • http://tejovotemikodes.getenjoyment.net/jotilo.pdfIn PDF document text
    • https://zewabezasakaru.weebly.com/uploads/1/3/4/5/134593707/rukuparifewunul-ledadivanadogif-gedebop.pdfIn PDF document text
    • https://pinabufibofux.weebly.com/uploads/1/3/2/6/132682338/witevovuwotosix_nipafenuvamad_nosizuxirowokaf_patojuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385631/normal_602f1c37d7366.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/daniwodug/ap_grama_ward_sachivalayam_notification_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/74635350395.pdfIn PDF document text
    • http://kepawomokatuke.myartsonline.com/reddy_heater_30000_btu_parts.pdfIn PDF document text
    • http://vojemigami.rf.gd/xeremelemilapodezasulagif.pdfIn PDF document text
    • http://baloxes.epizy.com/charmed_1998_season_2.pdfIn PDF document text
    • https://s3.amazonaws.com/fivebo/zigenewi.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/buffered_vpn_free.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_off0000dd8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8F 4992 bytes
SHA-256: 398265f4f74152a7d0e67b81d94f6d168ad4b77b0d57fa2e596ee4841af2f328
font_01_sfnt_off0000ee99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE99 10048 bytes
SHA-256: 26713825a603e4a95b2046d60a7e452150b76f1d371d0022354d9c560c38f168