Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc3a3e0e226914e7…

MALICIOUS

PDF

71.9 KB Created: 2021-02-26 03:50:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 97aa21c5fde3db6ebbeba357f4f2b6eb SHA-1: 87bb47699fdf4c2fa4b909d8ca7ce47a172984c7 SHA-256: bc3a3e0e226914e747a54c47aadba123373b2b20d8921a862f6bca63d5b9659e
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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.
  • 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://baarspo.ru/award?keyword=technical+drawing+software+free+download PDF link annotation
    • http://gefosezidubajoz.scienceontheweb.net/nanostation_m2_firmware_xm.v5.5.6.pdfIn PDF document text
    • https://roxilegetewus.weebly.com/uploads/1/3/4/7/134721251/4928970.pdfIn PDF document text
    • https://xikisujegowo.weebly.com/uploads/1/3/1/8/131856166/fd50443c35cafe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444357/normal_6037f343160e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465145/normal_6019c021406f3.pdfIn PDF document text
    • https://woxigixekamut.weebly.com/uploads/1/3/0/7/130739530/6928052.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459324/normal_5fd6787681fce.pdfIn PDF document text
    • http://dawexefif.getenjoyment.net/girutubigogajerabojeg.pdfIn PDF document text
    • http://xufelaketodo.getenjoyment.net/neverending_story_easy_lyrics_skz.pdfIn PDF document text
    • https://kelebewo.weebly.com/uploads/1/3/4/3/134359650/f63b807a.pdfIn PDF document text
    • https://juzolafer.weebly.com/uploads/1/3/4/3/134382033/sokewipasameri-nulitagekuf-xudumi-ladifikep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_603176f663434.pdfIn PDF document text
    • https://wobofosowipifir.weebly.com/uploads/1/3/0/7/130776138/xonuvuzuxubiz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://liroporuki.myartsonline.com/2601861583.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_off0000de0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0D 5324 bytes
SHA-256: 74e0def3efaf5be240860bb55ee3c21d06709108d31b7300c85f52338e8b2565
font_01_sfnt_off0000f035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF035 10104 bytes
SHA-256: bbaae7691a64e5c72ff4a1717812762893768caf309efed17d27121cf8958125