Malicious PDF — malware analysis report

Static analysis result for SHA-256 4143e7e83f02e4f9…

MALICIOUS

PDF

80.9 KB Created: 2021-02-09 08:07:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 8755136637d7f247d1da295973d133bf SHA-1: c7d7cff5f01d0d787b0c0b49120a1cf3152cb81d SHA-256: 4143e7e83f02e4f9fd975ffaaa4686eb04a505675ee9cd6a80fee3d8e45b85bd
184 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.
  • 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://yafferge.ru/wb?keyword=requirements%20elicitation%20techniques%20pdf In PDF document text
    • https://cdn.sqhk.co/jagugide/9jg4sjh/exam_funny_status_video_download_sharechat_telugu.pdfIn PDF document text
    • http://itslm.fun/pokemon_flora_sky_rom_complement_dex_versionm24bb.pdfIn PDF document text
    • https://cdn.sqhk.co/vojasipi/jUjHje6/the_university_of_hong_kong_admission.pdfIn PDF document text
    • https://cdn.sqhk.co/tosuwukiwate/jEvjege/studenglass_gravity_bong_amazon.pdfIn PDF document text
    • http://prizinsta24.site/past_perfect_affirmative_negative_interrogative9pg79.pdfIn PDF document text
    • https://cdn.sqhk.co/karadirimose/cIibcVW/herpes_simplex_virus_2_igg_antibody_qualitative.pdfIn PDF document text
    • https://cdn.sqhk.co/fojupigek/djdwdhg/poxatejuvufigepokazonugo.pdfIn PDF document text
    • http://soul-felt.com/16006924501igep9.pdfIn PDF document text
    • https://cdn.sqhk.co/jisepozidis/ihiboSb/baby_lullaby_songs_go_to_sleep_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/reretukida/gdUVEgj/xegatum.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vidomolojo.epizy.com/70374814741.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/4941668651.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/jiminozilifon.pdfIn PDF document text
    • http://temekem.epizy.com/n_t_r_old_songs.pdfIn PDF document text
    • http://wajoran.rf.gd/83539674461.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_off000102d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D9 5528 bytes
SHA-256: 70ae60c71861582c2c50d81513e87770bf64483de03fecd9a85e6072ec79ef85
font_01_sfnt_off0001157e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1157E 9816 bytes
SHA-256: 485f2e1bbb82f778db14b2b99459873a82e0ab1aca9320161c82b8b6580ebd8e