Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5b38384ef167e30…

MALICIOUS

PDF

69.4 KB Created: 2021-01-31 02:43:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 582b6d80c56a8fdccd92fd84f28df943 SHA-1: 7e5376bf12b6b035bcd5b1164cf9e31a7956719e SHA-256: a5b38384ef167e30a575882411853054eb0dd4f1d49a523ce0f03ac25cbf6d64
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://seumenha.ru/123?utm_term=does+artifacts+have+summoning+sickness PDF link annotation
    • http://pop-marketplace.ru/wifawuparunafu0su8o.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449406/normal_5fe5d9390f5b6.pdfIn PDF document text
    • https://saxonolofazejel.weebly.com/uploads/1/3/2/6/132681209/6350224.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425909/normal_6013f6ffda8f9.pdfIn PDF document text
    • https://wutiduxa.weebly.com/uploads/1/3/5/3/135300785/rikawogebimozaja.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377098/normal_6007e0cf11951.pdfIn PDF document text
    • http://olymp-trade.top/download_ultimate_offroad_simulator_mod_apkr5wcg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469860/normal_5fc95b48096ef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501656/normal_5ffc8512a4fbf.pdfIn PDF document text
    • https://cdn.sqhk.co/javufikari/aiiwiav/radio_fm_online_polska.pdfIn PDF document text
    • https://lijepaxo.weebly.com/uploads/1/3/5/3/135324298/bidixokebuso_tiwozubozexilek_runozuwu.pdfIn PDF document text
    • https://cdn.sqhk.co/kebubupoxiz/ijaheNh/formula_car_crash_racing_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/bebiwamulanu/igeJnkA/3d_printed_ping_pong_ball_launcher.pdfIn PDF document text
    • http://help-mediasupport.com/180_days_of_reading_for_third_gradex3gqo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469860/normal_5fe148c626fe9.pdfIn PDF document text
    • http://summ-green.fun/annexure_e1_for_hsscjxs9u.pdfIn PDF document text
    • https://cdn.sqhk.co/fugolamudara/cLBhZoR/muliv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/muvarelo/cheap_thrills_lyrics.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_off0000d198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD198 5388 bytes
SHA-256: 2d967c1289e11851cf5c810c021ddc00a38ad6bc9f1e6a05a67947af69e643aa
font_01_sfnt_off0000e3d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D0 10836 bytes
SHA-256: 46ab8ef8649f88c8b0282dd188864ed32d98ad9eeab7133799462442d1f4ecd5