Malicious PDF — malware analysis report

Static analysis result for SHA-256 47d2b0b9d09dff36…

MALICIOUS

PDF

65.8 KB Created: 2021-02-20 21:57:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3de325f3b8db94e01095f3215aafe6ec SHA-1: 31ca170cd9f8971ff2526236f390949840e6a457 SHA-256: 47d2b0b9d09dff3647b96c01f32fee167441f86e536c7fad32a71d016065d208
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://crophysi.ru/wix?keyword=escort+passport+8500+x50+manual In PDF document text
    • https://zobirifojufegot.weebly.com/uploads/1/3/4/3/134374070/gutuxefibefok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465388/normal_60205adceb4a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481402/normal_5fff225946244.pdfIn PDF document text
    • https://cdn.sqhk.co/dopuwene/hgihdgf/download_the_sims_freeplay_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/korulifesewa/hhfDe3o/calendar_2020_november_template.pdfIn PDF document text
    • https://cdn.sqhk.co/sarunasol/M1gEbhd/venugojezunov.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobibab/x8HOhjb/40934924432.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464734/normal_602585c0864cc.pdfIn PDF document text
    • http://avbox.org/lines_of_symmetry_worksheets_6th_grade1r7ti.pdfIn PDF document text
    • http://jilet1.club/voice_game_online6risu.pdfIn PDF document text
    • http://instapriz24.site/gangs_of_london_episodes_imdb1ftzv.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/yhejcig/old_time_gospel_songs_videos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497646/normal_6000700965eda.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pimisigejofal.rf.gd/60219822587.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_off0000c543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC543 5564 bytes
SHA-256: 62e760f7ce22d5fb22b5413ea269982eea80a3600f916345723613dcab80167e
font_01_sfnt_off0000d81c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD81C 9936 bytes
SHA-256: fddc7243076a04af29154ca4ff7ee0b11d420d0a2036dea11eee8b021ebca857

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