Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e3e7c502acb916a…

MALICIOUS

PDF

74.8 KB Created: 2021-02-19 02:43:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: da90908602953428a0c2cd2693cf95a2 SHA-1: 5a5b136b16d54b61c79312b8e0f5af06b864dc37 SHA-256: 6e3e7c502acb916aba82586e727051353c257f4e03876a9f431c87571fd029cc
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://jacksth.ru/wb?keyword=hampton%20bay%20ceiling%20fan%20parts%20diagram PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417817/normal_60274f4cdb70b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370302/normal_6020c0c8badd8.pdfIn PDF document text
    • https://bixevojug.weebly.com/uploads/1/3/0/7/130739122/3d2c947d0.pdfIn PDF document text
    • https://falesejus.weebly.com/uploads/1/3/1/4/131483218/beda6ee4.pdfIn PDF document text
    • http://sisowim.iblogger.org/quadratic_inverse_function_worksheet_rpdp_answers.pdfIn PDF document text
    • http://dotenuvofatawe.iblogger.org/large_iced_coffee_with_cream_dunkin_donuts_calories.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370288/normal_600db9318512d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wozaxanakix.epizy.com/how_to_set_blank_wallpaper_android.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/15245934485.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/guidelines_for_intensive_care_unit_design.pdfIn PDF document text
    • http://junedujivoxoz.epizy.com/arrival_subtitles_free.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/ranominenavubeteme.pdfIn PDF document text
    • http://nelenubo.rf.gd/sejevifesufenof.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/fosubage.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/remote_control_android_phone_via_wifi.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_off0000e3d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D5 5680 bytes
SHA-256: 561681c9d3a1f7aea5bd590d98b3ec289dd2618d1fac6cc67b77f19dd7934143
font_01_sfnt_off0000f712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF712 11624 bytes
SHA-256: 2889d59f9c17dd9c05320a8284259613e5d71b34e8b07460fc6f721d31fefec7