Malicious PDF — malware analysis report

Static analysis result for SHA-256 9360a50274a9634f…

MALICIOUS

PDF

79.8 KB Created: 2021-02-17 08:24:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ebda4ec157a8cf8668efceb191aa6811 SHA-1: a2c80c3307dce04eaf784632ea5c8d6e6b62cfc8 SHA-256: 9360a50274a9634f1cc69816ed583a588abdbb07a582f43e508b22286e60bc32
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution attempt, likely initiated via spearphishing.

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://seumenha.ru/123?utm_term=ar+15+magazine+capacity+florida PDF link annotation
    • https://gunajogozezulom.weebly.com/uploads/1/3/5/3/135385825/mazobibizisobutaz.pdfIn PDF document text
    • http://dukobotabagujam.22web.org/descriptive_analysis_report_example.pdfIn PDF document text
    • https://dutebosolet.weebly.com/uploads/1/3/0/9/130969562/fe7250bd3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459624/normal_60213f0d3aadb.pdfIn PDF document text
    • https://wokulenazaxur.weebly.com/uploads/1/3/4/7/134744474/kowudosenawodor.pdfIn PDF document text
    • http://suwedujak.22web.org/what_sauce_do_they_put_on_chicken_quesadillas_at_taco_bell.pdfIn PDF document text
    • http://lagijiputofezak.22web.org/line_6_pod_hd_pro_x_rack.pdfIn PDF document text
    • https://taxufutusa.weebly.com/uploads/1/3/4/5/134514166/d57ec4e571.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485166/normal_60290c9043029.pdfIn PDF document text
    • http://votofeveta.iblogger.org/81035531568.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zetipetarot.rf.gd/alien_vs_predator_game_mega.pdfIn PDF document text
    • http://bibibojusajol.rf.gd/16121011895.pdfIn PDF document text
    • http://kagabefusexem.epizy.com/16282490392.pdfIn PDF document text
    • http://bimuvugibane.rf.gd/xewajevinorapipa.pdfIn PDF document text
    • http://gumofiwulova.epizy.com/fuzizebami.pdfIn PDF document text
    • http://gawuvuv.epizy.com/kuvowovoxit.pdfIn PDF document text
    • https://bit.ly/2CHLudtIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F6 5612 bytes
SHA-256: 1e7c2b1b53c324216895db5fdd65655642e24fae2cfc8dc9967fea4ff4d89fc7
font_01_sfnt_off0000f61e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF61E 11184 bytes
SHA-256: 59863c935410c4c9b9bff69e38ec2746c196d5c879845dd9bb51f74e8aef1ec8
font_02_sfnt_off00011ca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA2 16080 bytes
SHA-256: 8f6ddafd3b0ce2004b9503adf603897a58143e210ca714e8dcfcba1b249cf112

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