Malicious PDF — malware analysis report

Static analysis result for SHA-256 24720c882f1b5185…

MALICIOUS

PDF

71.8 KB Created: 2021-02-11 16:53:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b758323b183c6c45c6283b0086ae0b54 SHA-1: 9d2bc0b33e3442eb74e10477a8eeccb981e7abf6 SHA-256: 24720c882f1b51854639cb4e04765a8fb45e19c50bfe463c215e7e9bbbd1908b
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=diskdigger+license+key+1.20 In PDF document text
    • http://waystep.site/zavejinebiatog4.pdfIn PDF document text
    • http://radanews.site/62103369377zh340.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373016/normal_6000c25237d13.pdfIn PDF document text
    • https://cdn.sqhk.co/mobovogoneja/hhpvIFv/field_hockey_defensive_marking_drills.pdfIn PDF document text
    • http://omerkatanalp.com/formule_di_apertura_lettera_ingleseh892p.pdfIn PDF document text
    • http://bumadodari.iblogger.org/alif_allah_aur_insaan_ost_songs._pk.pdfIn PDF document text
    • http://viputixezererej.66ghz.com/whatsapp_status_love_romantic_song.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410447/normal_5ffc2ac151a73.pdfIn PDF document text
    • https://cdn.sqhk.co/nobukomorur/OvLOqjh/homeschool_teacher_planner_2020-_21.pdfIn PDF document text
    • https://cdn.sqhk.co/xiladuxe/giNrThe/75337611374.pdfIn PDF document text
    • http://olymptrade.buzz/72454511044gqbuy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410002/normal_60052d4cb3ce8.pdfIn PDF document text
    • http://puxeguka.iblogger.org/pigujikovuvalilegofure.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371495/normal_5fe02ce4b6a1d.pdfIn PDF document text
    • http://totalcreditcheck.info/crossfit_wod_log_bookoiimz.pdfIn PDF document text
    • http://xaxifibipebux.iblogger.org/skull_trumpet_sound_effect.pdfIn PDF document text
    • http://fruct.space/top_10_best_comebacks_evereg242.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zunijakokusageg.epizy.com/busexuloj.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_off0000db1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1C 5420 bytes
SHA-256: 866ea65869a3c8c72022b87ef5708b0c2d324aaaea3a5d6a5189f2f99f122991
font_01_sfnt_off0000edbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBF 10644 bytes
SHA-256: fdf1deebb38e59fa734d2e9bcddb3b7c9befac7472270525c345f9d2371d0db1