Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fff51bd3cc9586b…

MALICIOUS

PDF

68.9 KB Created: 2021-02-26 01:23:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 377baf4ac68b6c9d519f7f6ef21e65ac SHA-1: 7fe59e9b202b21f3ca3e0a518f5718ce1898bcb3 SHA-256: 3fff51bd3cc9586b6299be83d1970b268a0524e00163c08f570a8eae3fd0edf5
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/award?keyword=city+of+ashes+audiobook In PDF document text
    • https://cdn.sqhk.co/muzedikerum/ggjajjb/unofficial_uniwar_damage_calculator.pdfIn PDF document text
    • https://mipapipav.weebly.com/uploads/1/3/4/0/134012398/34c391b2c91c.pdfIn PDF document text
    • https://cdn.sqhk.co/zuvaworizon/ib5Qxib/56173911826.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/g6gdA82/warby_parker_eye_exam_houston.pdfIn PDF document text
    • http://pazujiz.mygamesonline.org/how_to_get_a_food_vendor_license_in_arizona.pdfIn PDF document text
    • https://gilepijojuju.weebly.com/uploads/1/3/2/7/132740412/1b9b0b.pdfIn PDF document text
    • https://vagewojevibo.weebly.com/uploads/1/3/4/8/134873572/8a9f0f2c92.pdfIn PDF document text
    • https://kiwiwutirove.weebly.com/uploads/1/3/4/7/134707888/nodakiwu.pdfIn PDF document text
    • https://cdn.sqhk.co/jaruxabal/QFRjfgd/football_crowd_goal_sound_effect.pdfIn PDF document text
    • https://fuvejewitopi.weebly.com/uploads/1/3/1/0/131070508/poxuvofofana.pdfIn PDF document text
    • http://galosidijixiwu.mypressonline.com/convert_2d_autocad_drawing_to_3d_online.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/kozewuposoridil/vemedufekovoworutotido.pdfIn PDF document text
    • http://xolavozezimodan.onlinewebshop.net/fagirikipivewefewokula.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/bananas_nutritional_information.pdfIn PDF document text
    • http://vilumepidiwego.myartsonline.com/best_mech_in_battletech_tabletop.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/informagiovani_macerata_orari.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/clubbers_guide_to_ibiza.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/4044978329.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/bounty_game_app.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/lahore_pakistan_weather_report.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_off0000d289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD289 5076 bytes
SHA-256: 89e52a56ea489ac40c08660d31c28e1ee348dbeb30dc3d57d1780cb374eb0b34
font_01_sfnt_off0000e3d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D4 10208 bytes
SHA-256: 9a21d1d55b2cea36d46854f28e8dc9d02586b8d5e2d1b6d7af1954844d9a89c0

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