Malicious PDF — malware analysis report

Static analysis result for SHA-256 6add9986a284539e…

MALICIOUS

PDF

84.6 KB Created: 2021-03-31 02:51:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a57610df402da90eb7941385805664b1 SHA-1: efed9ae512d9421580d9cb32cedb8d0d6f999d97 SHA-256: 6add9986a284539edba11ada8abeffafc346dcf67521bc2bd5f59fc15c37bbf2
126 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. The document contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly suggest an attempt to trick users into visiting potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://botokaw.ru/strik?utm_term=what%2527s+up+tiger+lily+quotes PDF link annotation
    • http://clebohets.xyz/718011968608ptr2.pdfIn PDF document text
    • https://xonasuxodu.weebly.com/uploads/1/3/2/6/132681295/3795047.pdfIn PDF document text
    • https://gisixumaxen.weebly.com/uploads/1/3/1/8/131856636/eec14fb7.pdfIn PDF document text
    • http://small-italy.space/81914068021rvrjd.pdfIn PDF document text
    • http://alteramaks.world/56712035606qz6oo.pdfIn PDF document text
    • http://guitar.su/398617781ta36x.pdfIn PDF document text
    • http://tiwikif.22web.org/tewun.pdfIn PDF document text
    • http://mosquito.codes/15247732558docch.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://joxupabazifo.rf.gd/zodijasataziluwoxilize.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3705b58c-0a68-45c6-b20b-555592550d1b/lunivuredofoxuriz.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/37957756388.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a9f4460-a9fa-4548-97d5-ec9083396563/what_causes_tropical_climate.pdfIn PDF document text
    • https://dba0ca6b-c979-46b3-87c9-041648dee063.filesusr.com/ugd/6f58fb_7440a575c7c540fbbf53c0966c8a27e1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pidufozu/data_science_machine_learning_and_ai_for_business_ie.pdfIn PDF document text
    • http://zuwopun.rf.gd/25749993986.pdfIn PDF document text
    • https://ea7788ad-ef5a-48b5-911d-3ad522045378.filesusr.com/ugd/f3bfbb_ab9ccae95bf04b68b877e693b2890266.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/liftmaster_la500_diagnostic_codes.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8D 5356 bytes
SHA-256: 3de51aba24b51c831845ce89f9fda702c327ea92acb1e0a840eafc62928822fe
font_01_sfnt_off0000ffce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCE 2116 bytes
SHA-256: 07e9bf4ff69cbaccb5ee45f507fdf08481508ba834899bf7fd7e08069b296050
font_02_sfnt_off000109a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A1 11236 bytes
SHA-256: 372d043e17440a349987ecd5716ed16aff2c41a1bbf7339e96725a556dbb3928
font_03_sfnt_off00013012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13012 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67

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