Malicious PDF — malware analysis report

Static analysis result for SHA-256 99e5d9e6a94ef40d…

MALICIOUS

PDF

73.1 KB Created: 2021-02-21 12:43:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 900105169e9a0f3f13026edd7ab98b14 SHA-1: 66462478124dae2973d5aa6d6d7802a8ceb3989c SHA-256: 99e5d9e6a94ef40d967f63485667312b81d98bf6b074cb7c53055ecb46473cbc
244 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
  • 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 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.
  • 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/wix?keyword=pathfinder+arcanist+archetype+twilight+saga In PDF document text
    • http://geniusenglish.space/who_invented_the_electricity_first75lk4.pdfIn PDF document text
    • https://nazalufu.weebly.com/uploads/1/3/1/4/131409274/4c19ca645.pdfIn PDF document text
    • https://cdn.sqhk.co/diridenafa/fmSicgg/social_media_intelligence_book.pdfIn PDF document text
    • https://cdn.sqhk.co/nuroteditu/giSrjig/88509788709.pdfIn PDF document text
    • http://quickpapp.online/partenogenesis_pada_lebahm1cb6.pdfIn PDF document text
    • https://xunopigiwigon.weebly.com/uploads/1/3/1/6/131636761/fb49482fa12d721.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485309/normal_601d97e9a0042.pdfIn PDF document text
    • https://romarifekaxa.weebly.com/uploads/1/3/2/6/132683260/e9f58671.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490920/normal_5fed34d70b568.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/egxhbjd/princess_run_spiral_twisty_road.pdfIn PDF document text
    • https://raxipova.weebly.com/uploads/1/3/4/2/134234678/f07496.pdfIn PDF document text
    • http://selomankap.space/28846689105obu1i.pdfIn PDF document text
    • https://cdn.sqhk.co/kisereta/CFThaij/7106696176.pdfIn PDF document text
    • https://cdn.sqhk.co/sawowudin/pjbjbie/my_home_design_modern_city_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nevupediwix/b8jbjro/free_coloring_pages_christmas_lights.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/xasovewipeje/springboard_mathematics_course_3_book.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/donation_request_letter_template_for_schools.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/28767230746.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/85447972626.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_off0000e0fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FD 5612 bytes
SHA-256: 938dc8ec394e5f62e6f656521ba1b286ebe915e2cb0da60d4f1e05006899e3cc
font_01_sfnt_off0000f42c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42C 10136 bytes
SHA-256: 19da9e95f2436bbd7667e02c97bd24735db986b2935c3dfd2ac8e09e91b97bf3