Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e94fd72699fcddc…

MALICIOUS

PDF

76.5 KB Created: 2021-03-06 01:41:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7ca051be674d63d9d8f3749629fddd2a SHA-1: 139b410f9546c1545d27506e7d0c5bdf251a16cc SHA-256: 0e94fd72699fcddc779024968f2c5ebabfdc4348822994d29de3de8beed41341
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://zajinet.ru/wix?keyword=racism+in+othello PDF link annotation
    • http://aycotoro0.xyz/vupikowifiruje938xu.pdfIn PDF document text
    • http://triple-doska1.club/pocket_mortys_morty_games_guidekw3pw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474720/normal_5ffdb5819c194.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368982/normal_5fd91caf77cea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_601092161281e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445103/normal_603a3de927e63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416664/normal_602d9f6e2bfc9.pdfIn PDF document text
    • https://wovigapugup.weebly.com/uploads/1/3/2/7/132710676/3545313.pdfIn PDF document text
    • http://filanion.online/descargar_biblia_de_estudio_arcoirisye5ku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465938/normal_5fe8e32187e97.pdfIn PDF document text
    • http://axecheat6.xyz/million_dollar_consulting_summarywzmrn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369189/normal_5ff17261b9938.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479684/normal_5fdbfa1dba867.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384037/normal_5fe3fe028efcb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478127/normal_602ed8ebdeb1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375699/normal_6023d480559a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406482/normal_5fcb54715db70.pdfIn PDF document text
    • https://sopoxovolofu.weebly.com/uploads/1/3/4/5/134509961/movebodupaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379733/normal_5fff9effdc1ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378153/normal_6022498540a86.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_off0000f148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF148 4952 bytes
SHA-256: e864cbf1339cb958f8ec9c7a1c98253ff2b6eb62c91b913adb7a9efee651cc48
font_01_sfnt_off000101fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101FE 10204 bytes
SHA-256: f4820a5609f2888cf571bae93b135818b7fca377f019be7a6902b0d10030fda3

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