Malicious PDF — malware analysis report

Static analysis result for SHA-256 8743428fb999a743…

MALICIOUS

PDF

75.4 KB Created: 2021-02-06 20:09:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 53229a67063939763dc8e0e2f5b0ab59 SHA-1: 4e3ce4d102ecfb4485ebf3f71d8fbb84a9aa2e42 SHA-256: 8743428fb999a7431424fb6145b8e418eb461ccd90a0079a5c2bdf78a9f45035
196 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.
  • 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://leonvi.ru/wb?keyword=spider%20man%20ps4%20game%20%20link PDF link annotation
    • https://cdn.sqhk.co/nilofixogezu/481ihRg/labotekamisoja.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417037/normal_5fe206816d1f7.pdfIn PDF document text
    • https://cdn.sqhk.co/jolodovi/exEIgd0/true_football_national_manager_patch.pdfIn PDF document text
    • https://cdn.sqhk.co/baxajufim/eRtijrO/89687454031.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448110/normal_6009eed181709.pdfIn PDF document text
    • https://ruxebawinafa.weebly.com/uploads/1/3/0/7/130776533/vexujala_lofuwu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501385/normal_5fdbe4d7b043c.pdfIn PDF document text
    • https://cdn.sqhk.co/fegukajebaj/Rhhlhfy/cute_halloween_costumes_for_couples.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403948/normal_6017218d1d235.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417834/normal_5ff995cfee38f.pdfIn PDF document text
    • http://zakazemakeda.22web.org/aeroplane_sarmad_video_song.pdfIn PDF document text
    • http://nextauto02.ru/componentes_de_un_sistema_hidroneumatico_residencialsmvbm.pdfIn PDF document text
    • http://spoonnumberone.xyz/49165042522q1kk3.pdfIn PDF document text
    • https://cdn.sqhk.co/jebanufebejo/ifcrbDQ/demon_challenge_2_realm_grinder.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464070/normal_5fd64317c4a05.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_off0000e509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE509 5536 bytes
SHA-256: 942d21d96f2b6d44fe918dc846153b6fcd2b64e8b37ad65204bcc34acf5f4a12
font_01_sfnt_off0000f7c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C5 12488 bytes
SHA-256: 83b7e7a479ea40e06898330ed2439c517e2027fc40053c3e505fe504da1eaf1e