Malicious PDF — malware analysis report

Static analysis result for SHA-256 d27644a6d1223301…

MALICIOUS

PDF

72.2 KB Created: 2021-02-03 01:44:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: cee59efb070c108d31d23b4eb83c8df2 SHA-1: fc3091d725ce39e32076134f21737c253e72fe13 SHA-256: d27644a6d1223301bffccc9a16b24f2130b1e89f012efdcf6bbe4ba3e2bb487b
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/aws?utm_term=bed+sheet+dimensions+australia In PDF document text
    • https://fonekukiko.weebly.com/uploads/1/3/5/3/135393218/berumolomore.pdfIn PDF document text
    • http://lnstagaram-verifiedbadges-from.com/wonisadegesavunenun.pdfIn PDF document text
    • https://cdn.sqhk.co/bijininabex/gghaxji/joguwaredodo.pdfIn PDF document text
    • http://gufutaca5.xyz/fallout_3_hack_terminal_console_command7ah4t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455403/normal_6012dab62f948.pdfIn PDF document text
    • https://noperutepa.weebly.com/uploads/1/3/4/7/134721309/6262313.pdfIn PDF document text
    • https://cdn.sqhk.co/detaludolef/enijbuW/pic_word_game_online_free.pdfIn PDF document text
    • https://gakafapokizi.weebly.com/uploads/1/3/5/3/135319358/7199348.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379837/normal_5fe5c61aad7ab.pdfIn PDF document text
    • https://kexexetipo.weebly.com/uploads/1/3/4/8/134897314/rawewas-nabokipu-kiwuw-nukirefaw.pdfIn PDF document text
    • https://fegojobakib.weebly.com/uploads/1/3/1/1/131163858/juvivosawonolupawam.pdfIn PDF document text
    • http://pochta-24.cc/wuzisubatawogatyvg8d.pdfIn PDF document text
    • https://muxivetifobuxo.weebly.com/uploads/1/3/4/1/134131670/semejule.pdfIn PDF document text
    • https://zewemoledomuro.weebly.com/uploads/1/3/4/7/134746436/gubozono_zesomuribiwona_jepix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://polexusuzoxofiw.epizy.com/brother_birthday_wishes_video.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_off0000de90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE90 5112 bytes
SHA-256: a3c3058bf3afee1fbcefaafe08fa254b150398a5ba1a6b6da6abd38d7b3124a9
font_01_sfnt_off0000efc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC2 10672 bytes
SHA-256: f287f42c51ffb292b5ffce772f3f4bc51724de1ecec2046ad82cb91127c2064c