Malicious PDF — malware analysis report

Static analysis result for SHA-256 003fa3ddec94a465…

MALICIOUS

PDF

71.2 KB Created: 2021-03-04 11:08:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 33dd3d5bad0560c9ee4d6e42b43117b6 SHA-1: 0c26732d841ef5e3f2124dc02716d3fc8d752bca SHA-256: 003fa3ddec94a46504f2e8e7223e2ce065a76542b0844b4c724382f04c95906e
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous external URIs, including one pointing to 'xajibur.ru', suggests the document is designed to redirect users to potentially harmful websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating a non-clustered link farm on disposable hosting, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://xajibur.ru/award?keyword=2008+avenger+battery+change PDF link annotation
    • http://ductsunlimitedins.com/eclipse_ide_photon_64_bitqoqyt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412570/normal_6018335710d68.pdfIn PDF document text
    • http://porn77.design/50_shades_darker_onlinehus0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374699/normal_6011c5f4d60a1.pdfIn PDF document text
    • http://priz24.site/liberation_war_of_bangladesh_essay7grz2.pdfIn PDF document text
    • http://vuwimoxit.mygamesonline.org/1009769296.pdfIn PDF document text
    • http://newser.site/18509645421nkobt.pdfIn PDF document text
    • http://gapilojazixo.getenjoyment.net/how_he_loves_us_kim_walker_free_mp3_download.pdfIn PDF document text
    • http://dajexori.mypressonline.com/whirlpool_washing_machine_repair_service_delhi.pdfIn PDF document text
    • http://fanutoragozogow.sportsontheweb.net/86614541072.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447888/normal_603b28363c64c.pdfIn PDF document text
    • http://torchland.xyz/sesakiledoxugpge4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481828/normal_601c7397ba5bd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jujonejetas.epizy.com/44383593773.pdfIn PDF document text
    • http://mawokale.myartsonline.com/1349079226.pdfIn PDF document text
    • http://kakasis.onlinewebshop.net/what_can_i_do_with_a_technical_writing_certificate.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_off0000d882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD882 5528 bytes
SHA-256: 72c34b79cf864532edbf7e90720ed799b5514ccce09c602d6cb2896a523d4592
font_01_sfnt_off0000eb56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB56 10340 bytes
SHA-256: 7da413a03c7b1dc21ec6cd29aae03a7f04fe609513643af585a7bb2a5123d8ec

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