Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa015e8487c9b6b0…

MALICIOUS

PDF

76.8 KB Created: 2021-01-29 07:19:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: aa25ef1a5068990eb57c012cc2d03f46 SHA-1: efdc2983f8f43cd8813adb072829be711f442c46 SHA-256: fa015e8487c9b6b06d90f40aca334f1ba0c9b0e08d62f97cda44cdba7b1af132
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://jottigo.ru/wb?keyword=space%20program%20in%20the%20us%20today PDF link annotation
    • https://cdn.sqhk.co/narulaloro/Brjijhb/87852438499.pdfIn PDF document text
    • https://cdn.sqhk.co/vogoxaginoje/iYTeqgj/extreme_jet_ski_hire_main_beach_qld.pdfIn PDF document text
    • https://fetuzulozolu.weebly.com/uploads/1/3/0/7/130775138/fopajovakubupajadana.pdfIn PDF document text
    • https://cdn.sqhk.co/kasavakujosi/gjRhasx/deziwakeruruniwodobuke.pdfIn PDF document text
    • https://cdn.sqhk.co/noxomosanena/71PEOX0/water_surfer_bike_racer_stunts_simulator_2.pdfIn PDF document text
    • https://cdn.sqhk.co/litopozuf/cigphih/update_event_fullcalendar_v5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406501/normal_5fd853206de59.pdfIn PDF document text
    • https://cdn.sqhk.co/nivunufozub/iih1NKA/vowalenekutagoxidimumak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393488/normal_5fde4c3137ce7.pdfIn PDF document text
    • https://torudedo.weebly.com/uploads/1/3/4/3/134352944/nojovuki_bekobud_xinijolevujegod_nonodomadetiso.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxumududu/eYjjMhj/scary_wolf_sounds_mp3_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zolaxadivowe/WJji7jd/pukalilazofulovaluwabarow.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/ehgugjH/cyberfoot_2015_codigo_de_registro.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390095/normal_5fde802a37abe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452148/normal_5fc9acba61277.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_off0000ef17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF17 5660 bytes
SHA-256: 4706ad40e8102a018786dc77fe8ee2b635de354fbe598334b3bc075332106390
font_01_sfnt_off00010239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10239 10560 bytes
SHA-256: fbc4f9be5b992f81f24d8eea16ff541230d58cda84351db33ddcbef2c74aca66