Malicious PDF — malware analysis report

Static analysis result for SHA-256 64fd915d0872d37e…

MALICIOUS

PDF

81.1 KB Created: 2020-12-27 16:13:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 88a654e87e27915904fdbd10ad895bd0 SHA-1: 5d74bdfc80f0879f359243202f992c251281dcf6 SHA-256: 64fd915d0872d37e97dea489d663db845dcef8d5f6a3215612d9eb90560dba8a
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a link to a known malicious redirector, disguised as a wallpaper download. ClamAV and an ML classifier also flagged this file as malicious, specifically as a phishing trojan. The embedded URL is the primary indicator of malicious intent, likely leading to a phishing page or further malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://gettraff.ru/strik?utm_term=4k+ultra+hd+wallpapers+for+pc+gaming In PDF document text
    • https://static.s123-cdn-static.com/uploads/4453344/normal_5fe12430a6150.pdfIn PDF document text
    • https://cdn.sqhk.co/tewisifupib/gj6TpiA/pisoxedokikafizono.pdfIn PDF document text
    • https://cdn.sqhk.co/xufatirumina/ghbVMWI/teacher_appreciation_thank_you_notes_to_parents.pdfIn PDF document text
    • https://cdn.sqhk.co/sepunaro/d1uifhg/balloon_dogs_art.pdfIn PDF document text
    • https://cdn.sqhk.co/noxobabidof/jfiCigp/cube_wars_battle_survival_android_oyun_club.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373509/normal_5fcc0c16c3e80.pdfIn PDF document text
    • https://cdn.sqhk.co/peluxisomex/jgiahds/directv_now_free_trial_firestick.pdfIn PDF document text
    • https://cdn.sqhk.co/zivugeri/0icZgdv/48166680867.pdfIn PDF document text
    • https://cdn.sqhk.co/fifapupifig/jdmjejg/wordpress_hosting_godaddy.pdfIn PDF document text
    • https://cdn.sqhk.co/fumazuri/dih4p9i/first_war_of_independence_quizlet.pdfIn PDF document text
    • https://cdn.sqhk.co/bidomutarili/chajjFS/raven_audio_nighthawk_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/vixonafom/6gBgeib/crossword_daily_word_puzzle_answers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f34bdf6-a314-4623-b18c-63f5f7a1589e/57714722737.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6fa8469-b5b7-41f3-8566-51e288a65d95/house_of_cards_full_script.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b6154ef-ad91-4ec2-a6aa-cdad88e8cc95/rinosoladenewitu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44212a6c-1d8f-41e4-b9c1-c4dfafcf22f0/26403664317.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_off0000feed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEED 5716 bytes
SHA-256: 18529f918b3472a2823d386a550802ce0b899f94ad393fcf66de253d9f6f4eb5
font_01_sfnt_off00011253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11253 10716 bytes
SHA-256: 68e09862ffa6b060284919aac6a4d8fdce806b73b378a28b2cef10166b3fce86

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