Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bfa1eaa8245273b…

MALICIOUS

PDF

69.7 KB Created: 2021-02-22 16:58:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6acef55f9f477bd4a18df274c99f1f31 SHA-1: c436ad0fcda349a05fa4bacccf34f1993772fe85 SHA-256: 9bfa1eaa8245273ba759a03e8740adfbcbcb60151cfeb4d57c97bbe6bf4035a1
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://crophysi.ru/wb?keyword=what%20qualities%20should%20a%20good%20husband%20have In PDF document text
    • https://kitopelok.weebly.com/uploads/1/3/4/3/134355781/d2e435c1c.pdfIn PDF document text
    • http://complect-tech.ru/naa_autograph_video_songs_telugu_mp4k7hs2.pdfIn PDF document text
    • http://ehaberdevlet.com/zazaneguzatevavajitijowj.pdfIn PDF document text
    • http://sputnews.com/muposobefaguwujio6o1l.pdfIn PDF document text
    • http://mowuvivof.22web.org/rolanopatavisosijusa.pdfIn PDF document text
    • https://kunepupavebi.weebly.com/uploads/1/3/4/0/134095879/e006b.pdfIn PDF document text
    • http://xivusolokedujes.22web.org/folividoteb.pdfIn PDF document text
    • http://bovotuguf.iblogger.org/fit_for_life_book_principles.pdfIn PDF document text
    • http://leyloften.online/novufoxumaket8g31.pdfIn PDF document text
    • http://car-test.pro/venoduzododukukuk8den.pdfIn PDF document text
    • http://axecheat7.xyz/cnc_machine_for_wood_designwar3u.pdfIn PDF document text
    • https://labelamujevodit.weebly.com/uploads/1/3/1/6/131606697/fimupome.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/potamotaz/avast_premium_cleanup.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/sibimoragab.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/bbc_news_app_crashing_on_android.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_off0000d30c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD30C 5328 bytes
SHA-256: f21fac8c1fac32d83b74126cab614a8c0b2f9c4cd2010046a128d70a2e38c0cd
font_01_sfnt_off0000e533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE533 10772 bytes
SHA-256: 3604f42ba100be12a695b909c346904e3e2264ce0c566cb86b63647ea212a5bc