Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e3eb65fe738a395…

MALICIOUS

PDF

77.9 KB Created: 2021-02-14 03:31:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 968a90a28c12117f8f2d543c545da16d SHA-1: 5469e344717a790205859217b5a475289825e5ce SHA-256: 0e3eb65fe738a395aca726fcf338bc342a8c03d334eca8cd03c7f41a4d574dee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, directing users to various websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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/wix?keyword=ff14+shinryu+guide+deutsch PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368976/normal_6016a87080bee.pdfIn PDF document text
    • http://termometr-medikal.site/95454469982idtw1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451018/normal_5fd863eb5d43f.pdfIn PDF document text
    • https://lososegumupabi.weebly.com/uploads/1/3/1/4/131407698/fakiki_dududovutarare_mawisejulopotez_radaboduj.pdfIn PDF document text
    • https://cdn.sqhk.co/tefulobesa/cgehfbh/amazon_alexa_echo_plus_setup.pdfIn PDF document text
    • http://creditpm.com/pojipixi4sjwm.pdfIn PDF document text
    • https://cdn.sqhk.co/ferudati/jUhcKjh/download_grand_stickman_cover_v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406787/normal_5ffff9bd3baec.pdfIn PDF document text
    • https://cdn.sqhk.co/pofoxubo/gdYhage/73863166042.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370078/normal_5fdec02f69ecc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481695/normal_5fc6870c0de2d.pdfIn PDF document text
    • https://tagopudul.weebly.com/uploads/1/3/5/3/135392217/55c85887bf8b70.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/RHjbgiy/oscar_the_grouch.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489843/normal_5fd92a30d50a4.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BE 2952 bytes
SHA-256: 88dd92f12fa594c87f132d93485696c5106ddb9a5d263fa1b411e15f7f8bfc32
font_01_sfnt_off0000f449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF449 5240 bytes
SHA-256: 110b0b350f74ed9fd9a8758821ef5a1aa8d224e53a7563e515cf0eab725b8bce
font_02_sfnt_off00010631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10631 10756 bytes
SHA-256: 957e1320853780c9459065224cfa5e407b10c85b99c672b80122c5b826d56bcb

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