Malicious PDF — malware analysis report

Static analysis result for SHA-256 85cd28a90a0ad530…

MALICIOUS

PDF

69.8 KB Created: 2021-02-27 14:49:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 4d0c6b6e48b362eabbe8ce3be9051ad3 SHA-1: 21a6fdd07f1f4cc78d5e0af98f01200e3b376570 SHA-256: 85cd28a90a0ad53025f8c8ee385277b67d7d207f43ae69f60591eb25a7e64ab8
126 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
  • 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://gimoguvi.ru/wix?keyword=gorilla+glass+case+iphone+11+pro+max PDF link annotation
    • https://cdn.sqhk.co/zodunoxurob/e8JAmo5/sun_prepaid_promos_unlimited_call_and_text.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/62199238341.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/gifevajonu.pdfIn PDF document text
    • https://cdn.sqhk.co/ripalufix/5svjaMW/jovubugexamumo.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/serufure.pdfIn PDF document text
    • http://warowusavi.mywebcommunity.org/asus_dsl-ac68u_wifi_modem_router_-_ac1900_dual-band.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/pizezazogowadulovobemir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404514/normal_5fed9f2b5fc9f.pdfIn PDF document text
    • https://wefupavoxed.weebly.com/uploads/1/3/2/6/132682659/7808252.pdfIn PDF document text
    • https://cdn.sqhk.co/pefisemise/heMye1q/54453392272.pdfIn PDF document text
    • https://cdn.sqhk.co/bugininaxi/1ugnfLX/download_game_bouncemasters_mod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/74429756908.pdfIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/small_crossword_puzzles_with_answers_in_english.pdfIn PDF document text
    • http://kofaxafogi.myartsonline.com/nilajimolulupewemosuj.pdfIn PDF document text
    • http://donijexufenu.onlinewebshop.net/52492251012.pdfIn PDF document text
    • http://gubadif.myartsonline.com/59347172824.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_off0000d244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD244 5496 bytes
SHA-256: a8c519bc6661f1d78793d79f588df96dc3a85b9002d7e6937f5f26f8c4b71b3a
font_01_sfnt_off0000e4dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DD 10940 bytes
SHA-256: 7836306a5f536c53c0fe1edde1dea44499ff69970ff8c270b9afddf4f89f7219