Malicious PDF — malware analysis report

Static analysis result for SHA-256 415365351962675b…

MALICIOUS

PDF

69.3 KB Created: 2021-02-15 19:44:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b369f0232097584984f9f8798e2c6de4 SHA-1: 247371a9243ab5feb1a2a2f6297ebf05aba4664a SHA-256: 415365351962675b10a7c1ca6eedaf798cea7f4ebc5984323b787a56dc491c9c
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/wix?keyword=the+great+debaters+movie+response+answer+key PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4479904/normal_5ff30f2011f5a.pdfIn PDF document text
    • http://mexicotop.xyz/fodajugarowain7b.pdfIn PDF document text
    • https://cdn.sqhk.co/xogedusov/xchjihG/avatar_dress_up_games_online.pdfIn PDF document text
    • https://cdn.sqhk.co/nudofarus/bigyP08/black_desert_mobile_all_classes_korea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482023/normal_5fdaf0ba27caf.pdfIn PDF document text
    • https://cdn.sqhk.co/zukasedu/7hejfqP/between_the_lines_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/depivuni/gdMidie/penar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408187/normal_60274e51774ef.pdfIn PDF document text
    • https://wanibezitajijo.weebly.com/uploads/1/3/6/0/136000154/balojujiv-foxeputitepu-jitasej-tidakoxozeko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fajixe/lemamijizagezosedawab.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/nigunogebopedusa.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/refevuwofedomepelifu.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/car_race_movie_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/63680182844.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/cpm_integrated_math_3_textbook_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/26281017319.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/conceptual_physics_textbook_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/barbell_squat_form_tips.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c44d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC44D 5536 bytes
SHA-256: b32009526cfa3b1cc5c50415639d25e1a1a2e33be2d78f4145c9b0384cbe7e15
font_01_sfnt_off0000d70f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD70F 10104 bytes
SHA-256: f5ae1aa7ff40bf927c7c466458bcdb0a4fe2b70ae7196fde80e74a0bb6a8ab91
font_02_sfnt_off0000f9be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BE 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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