Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa99aed5aff20a4e…

MALICIOUS

PDF

65.6 KB Created: 2021-02-24 11:15:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e94a630475fff13d83b7649f8047c38d SHA-1: 863c3b6386b1aee2811eedf3e14c300d4e0b41d4 SHA-256: aa99aed5aff20a4e1a919f4f54c90e1b6ecf660583412a9b797c0c55ff06b849
186 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
  • 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.
  • 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://bologen.ru/wix?keyword=sims+mobile+apk+mod+android+1 PDF link annotation
    • http://optarfes.com/music_player_bass_booster_free_download_applicationootuw.pdfIn PDF document text
    • https://pufedoxavode.weebly.com/uploads/1/3/4/6/134613169/4281868.pdfIn PDF document text
    • https://xamirudanigux.weebly.com/uploads/1/3/0/9/130969419/rasadurolagixulepowo.pdfIn PDF document text
    • https://cdn.sqhk.co/bisuligiga/dy4giSK/wugugubu.pdfIn PDF document text
    • http://yoga-italy.space/orion_cooker_home_depotal5zk.pdfIn PDF document text
    • https://raxagipob.weebly.com/uploads/1/3/4/8/134883443/xunasomanagivesesuto.pdfIn PDF document text
    • https://zabaparadasikid.weebly.com/uploads/1/3/4/3/134317604/5599780.pdfIn PDF document text
    • https://feposogasutam.weebly.com/uploads/1/3/1/3/131384530/45400caee9b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495684/normal_5feb044e6b6d9.pdfIn PDF document text
    • http://good-production20.site/gafotekevotase0vyqf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405904/normal_5ff9db6b1718c.pdfIn PDF document text
    • https://cdn.sqhk.co/gizukakom/kjbgg8J/jewirikobugov.pdfIn PDF document text
    • http://on24-system.club/64035862394kh5le.pdfIn PDF document text
    • https://cdn.sqhk.co/sojuzafu/4iijigc/evolution_2020_las_vegas_shows.pdfIn PDF document text
    • https://pivatebovuwize.weebly.com/uploads/1/3/0/7/130775292/efa11cad5a3c53.pdfIn PDF document text
    • http://legrand-spb.ru/kosefolsjei3.pdfIn PDF document text
    • https://wisemidotoveto.weebly.com/uploads/1/3/4/3/134349295/lixulaladolawaduma.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c3b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3B2 5464 bytes
SHA-256: 97cef47b9f250aae7cb08ca4f727874f9b4b69114b587b740e28aa13fb2b8943
font_01_sfnt_off0000d625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD625 10324 bytes
SHA-256: 79854ad362573fba282dda779a52aa5696f49e593a2122fe52d8ec5add65dec0

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