Malicious PDF — malware analysis report

Static analysis result for SHA-256 2207b054ea584ad6…

MALICIOUS

PDF

81.1 KB Created: 2021-03-16 05:43:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c51edf8c42e70839574414469630cfa8 SHA-1: 75999ce7db5440c3cc2d59eb38b18d8269520050 SHA-256: 2207b054ea584ad6c954d02409fb38d99958b59d342c9b955be44e233034b4c5
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs, with one prominent link pointing to 'nipisod.ru', suggesting a phishing attempt or a redirect to a malicious site. The document's structure and content indicate it's designed to exploit user interest in printer prices to drive traffic to potentially harmful destinations.

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://nipisod.ru/strik?utm_term=hp+p3015+printer+price PDF link annotation
    • https://cdn.sqhk.co/risenulowo/cjjcVwG/neon_sign_computer_wallpaper.pdfIn PDF document text
    • http://ruzazeruduzelu.22web.org/zevoraxilu.pdfIn PDF document text
    • https://cdn.sqhk.co/gerukoso/ajcjihb/pewateluforapu.pdfIn PDF document text
    • https://cdn.sqhk.co/lazaxosu/tufUiih/80989570479.pdfIn PDF document text
    • https://cdn.sqhk.co/ribuwikoli/Dlhivjg/59818742948.pdfIn PDF document text
    • https://cdn.sqhk.co/disonixures/aQiijjp/youtube_lol_surprise_super_slime_sam.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/xupovobejanam/storm_cat_portable_generator_carburetor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19530307-ffb0-4a34-92d9-a517d5fb4cee/10000_reasons_matt_redman_ft_steven_samuel_mp3_download.pdfIn PDF document text
    • https://99470c7d-c692-4648-a7b8-36ea19db2883.filesusr.com/ugd/ab059d_d076a6a1e21840e1ad467804d03f8f56.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d29693aa-fc11-4ce6-9914-16843426b2f8/68651818218.pdfIn PDF document text
    • https://6593eeda-10fe-4128-810f-cbbc79f0a4f8.filesusr.com/ugd/c0a4bf_628108cbe234418f9d14d105a11fa6f4.pdf?index=trueIn PDF document text
    • http://tatifamajerub.epizy.com/graphical_analysis_of_motion_worksheet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27b1a470-123d-4ca3-a926-63dbb2a7245a/10686922040.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/c_difficile_isolation_guidelines.pdfIn PDF document text
    • http://jebimotanuz.rf.gd/shadowbringers_monk_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/nolib.pdfIn PDF document text
    • https://3e021c9a-284a-4c54-9ba1-f6d43d4d2ba5.filesusr.com/ugd/a619af_32fffc0b9af24f6e8d66918e9dcfb715.pdf?index=trueIn PDF document text
    • http://punugituk.epizy.com/penny_stocks_list_nyse.pdfIn PDF document text
    • http://nodezolejew.epizy.com/38934139443.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/federalist_70_guided_reading_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fd3950c-22f1-41ec-bd0a-45637b0c2193/english_grammar_hsc_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/wazurewijejabedexexolof.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_off000100ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100EF 4948 bytes
SHA-256: 3cc523e00ee2c00fb9412b29d749b92ca30b193dbac18617b99d3e3e4f06912e
font_01_sfnt_off000111eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111EB 11104 bytes
SHA-256: cfa99c7f7f4d89796e2f51e7207c130029a1b003f51b414c542c4566799a2526

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