Malicious PDF — malware analysis report

Static analysis result for SHA-256 21f209591a7d62a2…

MALICIOUS

PDF

76.4 KB Created: 2021-02-17 19:42:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: c47e083135f794818f7f9057bf7225ed SHA-1: 38fb6978fa5ca521172b27d4790200303ffefd56 SHA-256: 21f209591a7d62a2c0252c9b639a875d91f07d125ebd17f6cf83392a11856fb1
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://yafferge.ru/wb?keyword=araby%20by%20james%20joyce%20plot In PDF document text
    • http://hookup153.site/793239433181ishf.pdfIn PDF document text
    • https://cdn.sqhk.co/kisunika/jbNCib5/hooked_chat_stories_free.pdfIn PDF document text
    • https://cdn.sqhk.co/mibajufaneja/gcgiJPv/rifidobososutijub.pdfIn PDF document text
    • http://shoop-fk.ru/daneripijedafunudekojabibpte2.pdfIn PDF document text
    • https://cdn.sqhk.co/tusupuwadoda/TJhdpfX/video_player_all_format.pdfIn PDF document text
    • http://idealicaitalia.website/oatey_purple_primer_msds_sheetswfdc.pdfIn PDF document text
    • https://cdn.sqhk.co/pegipoveridi/avoL2he/snake_apple_game_unblocked.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421473/normal_6029d1d2c75d6.pdfIn PDF document text
    • https://cdn.sqhk.co/gesokusa/deWiixx/highway_bike_racing_traffic_moto_racer_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/fujalapevame/Jicibjc/in-_q-_tel_summit_2019_palm_springs.pdfIn PDF document text
    • https://cdn.sqhk.co/lijuwezasip/NsPjjQm/zomifimofibeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453734/normal_5fc66fe59d9b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380076/normal_6001e93ebe708.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405437/normal_5ff459330919d.pdfIn PDF document text
    • https://cdn.sqhk.co/wugolekufo/3ghJgzQ/hustle_castle_hack_apk_android.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/sugowubuf/journal_of_emergency_medicine_case_report_submission.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/autograph_movie_all_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/google_android_robot_name.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_off0000ed39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED39 5388 bytes
SHA-256: 79f5379bb689fd7b5c8feca47f6f9760f902b73ec078ea92043081343356b825
font_01_sfnt_off0000ff7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7A 11092 bytes
SHA-256: b76d6cfdc938c29b4092e7e8bf81ed28ff2e5a661aca059aa946c61adc420b06