Malicious PDF — malware analysis report

Static analysis result for SHA-256 49335b41ea5cdcff…

MALICIOUS

PDF

75.0 KB Created: 2021-01-15 00:13:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: ba202a8f826c995a8e384e1fe39be7b8 SHA-1: de03e5d7aef3c8523c5f6ca003ef16c61e27d10a SHA-256: 49335b41ea5cdcffc94a79e951690b4fb60e3743f689d737efaddf12f872d073
214 Risk Score

Malware Insights

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

The PDF contains numerous links, with one identified as a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to distribute or host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://cctraff.ru/aws?utm_term=chrome+addons+video+er In PDF document text
    • https://bimozasobo.weebly.com/uploads/1/3/1/3/131398313/1266974.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455178/normal_5fdc62235843a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/wisutatagasuwenofakemo.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/19117923198.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/forrester_wave_rpa.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/car_crash_meme_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/videohive_after_effects_projects_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/60153624287.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/pricing_table_html_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/65953711205.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/free_admin_panel_website_templates.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_off0000e830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE830 5000 bytes
SHA-256: 540656ab3fffb668ad5e2253bec327b4100214a2d2ae76b8ad334fff0470ccf9
font_01_sfnt_off0000f901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF901 11228 bytes
SHA-256: d47cd81f2cdc8f98c9cc9a76faaf55625c4759276db002357e7bf128255ee50a

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