Malicious PDF — malware analysis report

Static analysis result for SHA-256 a266a50be2c5c0e8…

MALICIOUS

PDF

66.2 KB Created: 2021-03-01 12:02:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1cdb85e296f33a400e48f6e9001a3999 SHA-1: 202c1e63e0beec9dc39fa3b3c4bcf96d41b34bea SHA-256: a266a50be2c5c0e89ef722d822a65ceab666bc23c0a436145e1fbc917ccdc59f
184 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=esto+que+soy+eso+te+doy+acordes+ukelele In PDF document text
    • http://worldthailand.fun/the_portable_hannah_arendt6nfnb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365602/normal_5fcff0a8ea9f9.pdfIn PDF document text
    • https://cdn.sqhk.co/nanubebebot/ighea4U/dc_comics_animated_movies_coming_soon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452851/normal_60199e0f9496b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379733/normal_5fe0d7765e2c1.pdfIn PDF document text
    • http://poroda.site/stanley_wet_dry_vac_8_gallon_filterqqr6r.pdfIn PDF document text
    • https://cdn.sqhk.co/midipijikami/qgfyZha/military_tacticians_of_all_time.pdfIn PDF document text
    • http://koponegigat.medianewsonline.com/42293762954.pdfIn PDF document text
    • https://cdn.sqhk.co/pemenixa/7bijrJR/donixinol.pdfIn PDF document text
    • https://cdn.sqhk.co/vezukefuza/m6C2idN/directv_now_cost_with_at_t_unlimited.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/vojapu/xajoweriwalus.pdfIn PDF document text
    • http://wizuzipureja.epizy.com/68027306458.pdfIn PDF document text
    • http://xipanizi.myartsonline.com/tipo_de_archivos_de_video_para_whatsapp.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_off0000c3bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3BD 5180 bytes
SHA-256: eb57d71e6397a4e63e1a6f2504f5df1d03c6836275ed9bb548a6ac9371f2cb19
font_01_sfnt_off0000d579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD579 11440 bytes
SHA-256: e67eb31b5de1f758907739d336f8775b790b741b7357262369c6a6840bb0b73b