Malicious PDF — malware analysis report

Static analysis result for SHA-256 85f5a4b3480dd6c7…

MALICIOUS

PDF

68.8 KB Created: 2021-01-18 03:51:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-31
MD5: b14775d89307c95e28965b2c93ab6da9 SHA-1: 3f5a7903af39dd2cc68b912328a0f28e129dee05 SHA-256: 85f5a4b3480dd6c7a39ec6f615bb97d2998e5ff580711b8763a08b21782f3af5
126 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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/123?utm_term=phase+change+worksheet+key PDF link annotation
    • https://cdn.sqhk.co/sejixikerut/es1hbTH/vax_carpet_cleaner_black_friday.pdfIn PDF document text
    • https://cdn.sqhk.co/zimevegi/ijMCshh/fun_words_that_start_w_j.pdfIn PDF document text
    • http://talebakela.iblogger.org/renal_doppler_ultrasound_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/fujalapevame/iicjdqa/teduwefoletusito.pdfIn PDF document text
    • https://cdn.sqhk.co/gukawaki/hbpjejb/sonutuzamu.pdfIn PDF document text
    • https://cdn.sqhk.co/varomapit/hhjgjgj/tosifiraledinaki.pdfIn PDF document text
    • http://bubuwem.iblogger.org/18187683663.pdfIn PDF document text
    • https://cdn.sqhk.co/tewokozogop/zicigPc/nikejubo.pdfIn PDF document text
    • https://cdn.sqhk.co/motulobugaji/ialcyhg/wanozijolavivomag.pdfIn PDF document text
    • http://jijufik.22web.org/9453810093.pdfIn PDF document text
    • https://cdn.sqhk.co/kalijada/RJCgG0p/rotakibisevotazexibopu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://finesegugumemo.epizy.com/bhoot_fm_20_april_2018.pdfIn PDF document text
    • http://xibubew.epizy.com/82188925098.pdfIn PDF document text
    • http://xivubijorudi.epizy.com/51748955878.pdfIn PDF document text
    • http://femejedad.epizy.com/60127353167.pdfIn PDF document text
    • http://jufofokisib.epizy.com/onmovies_apk_2019.pdfIn PDF document text
    • http://lugirike.epizy.com/vans_plaid_checkerboard_old_skool_platform.pdfIn PDF document text
    • http://rigirulame.epizy.com/64928779973.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_off0000d05e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD05E 5288 bytes
SHA-256: 28f73ae46382a18aa441f7bad731e682b06e744749a4a3a054e3b7a9f554a449
font_01_sfnt_off0000e269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE269 10496 bytes
SHA-256: ca2ca8d55194ad5831ff77e406afc9e9ba686dc266287a52cbf4a115ac5d90ab