Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c8d97e0c84793d5…

MALICIOUS

PDF

72.6 KB Created: 2021-02-25 00:14:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 536c807bbc189544d39ba84dff5b26af SHA-1: 9da5a1b0c8c3a59cf4488ca808895b92a90bdeda SHA-256: 4c8d97e0c84793d5276cc53fdabfcdb9fb5ff591dd6897de311cbd4dd67e1ce9
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/123?utm_term=how+to+hook+up+samsung+blu+ray+home+theater+system PDF link annotation
    • http://powerpoint4you.ru/free_blank_flash_card_template8dobh.pdfIn PDF document text
    • https://vumetubav.weebly.com/uploads/1/3/0/7/130776444/bebijogizi.pdfIn PDF document text
    • http://dosaxixapaxa.medianewsonline.com/muxogijexuvufo.pdfIn PDF document text
    • http://luminar3-download.xyz/bangla_font_free_for_windows_7dpvs8.pdfIn PDF document text
    • http://punavuvipufov.sportsontheweb.net/ley_de_ingresos_del_municipio_de_puebla_2019.pdfIn PDF document text
    • http://jasazotinalol.mygamesonline.org/bersa_380_safety_on_or_off.pdfIn PDF document text
    • https://cdn.sqhk.co/gapekozuwa/jHjblV1/85365100275.pdfIn PDF document text
    • https://sarisiwubaj.weebly.com/uploads/1/3/0/7/130739508/88d695308a.pdfIn PDF document text
    • http://naturebiolog.fun/italian_music_jewelry_boxbv7pc.pdfIn PDF document text
    • http://egosikenclub.com/jvc_kd-sr40_usb_cannot_playta3fd.pdfIn PDF document text
    • https://tomoniwibisuxis.weebly.com/uploads/1/3/5/9/135961627/rifinaximinofexuv.pdfIn PDF document text
    • https://nukivobiwej.weebly.com/uploads/1/3/4/0/134016752/58381796a.pdfIn PDF document text
    • http://firstdoctor.xyz/automatic_coin_counter_near_mea6937.pdfIn PDF document text
    • http://xumupizaxuto.scienceontheweb.net/og_mandino_the_greatest_salesman_in_the_world_summary.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sabiwilurase.atwebpages.com/zuganasufuta.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_off0000df27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF27 5592 bytes
SHA-256: 59e18c3f27139366a40d2696dd909c981b85ee890e515b9035f5812e01d9be1b
font_01_sfnt_off0000f213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF213 10332 bytes
SHA-256: 817cc90e1cbe8dc64c9f29d1e34240cd359201145bf68e2349203dcf14b8254d