Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c59521904ddcd44…

MALICIOUS

PDF

66.8 KB Created: 2021-02-22 22:08:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 1b7d9ad7c7389938c9aa924af2279951 SHA-1: 3798f38773e652f6e8fa8899c78076bd6460f3d3 SHA-256: 4c59521904ddcd4493dd779c7032c5fc4767bdf3a4eaddc213ede45d5bbc5eb1
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wb?keyword=memories%20bring%20back%20memories%20bring%20back%20you%20choir In PDF document text
    • https://cdn.sqhk.co/bogovureg/yPiiGhe/penguin_running_speed.pdfIn PDF document text
    • https://cdn.sqhk.co/vaminika/zhcxdTH/twilight_movie_flix_pro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367914/normal_600bd3bf430ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370309/normal_6033f5e5eb498.pdfIn PDF document text
    • http://fefafumevi.iblogger.org/wow_1._12_warlock_pvp_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450427/normal_601a0ef67cebf.pdfIn PDF document text
    • https://cdn.sqhk.co/zifibikom/jzVhfjc/bidetedawubi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390642/normal_5fe5806430fa2.pdfIn PDF document text
    • https://cdn.sqhk.co/gawisibiw/sEjgATD/mini_arcade_two_player_games_ps4.pdfIn PDF document text
    • https://cdn.sqhk.co/koditisalupe/cfgdhjM/jipuzorukoni.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dekubovuvupo.epizy.com/84766141095.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/faqirwali_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezux/toxicity_soad_album.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/iron_man_endgame_wallpaper_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/alfajores_guaymallen_informacion_nutricional.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/future_perfect_tense_exercises_with_answers.pdfIn PDF document text
    • http://webinurerebalo.rf.gd/whatsapp_in_laptop_bluestacks.pdfIn PDF document text
    • http://gurelijefumodaw.epizy.com/nezawozi.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_off0000c8f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F1 5492 bytes
SHA-256: 977ef14b632fadeb0d4ff526ef3f00b13d7cdc28bb70dda26f126b2dac604dac
font_01_sfnt_off0000db8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8C 9960 bytes
SHA-256: df8a8c31734375e5f26abb8d2c4516b5127ff9424176fcf87aa55e707cf1e08f

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