Malicious PDF — malware analysis report

Static analysis result for SHA-256 ada48e344daef37b…

MALICIOUS

PDF

81.2 KB Created: 2021-04-06 11:48:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c0cdba39ddf46511b87a4fbafd994147 SHA-1: 106b6ffa08f805955757b3356e5ae9213031227e SHA-256: ada48e344daef37b812995f5951e04f4ef4ffc73019224661b6b6e1eb74d3210
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://jottigo.ru/strik?utm_term=7+day+mental+diet+challenge PDF link annotation
    • http://ogranifruit.space/what_shampoos_have_salicylic_acid_in_themy4b1i.pdfIn PDF document text
    • https://kutijodokijo.weebly.com/uploads/1/3/4/7/134706590/xovosoxewikilumomot.pdfIn PDF document text
    • http://regsen.website/92103080731u6odu.pdfIn PDF document text
    • https://cdn.sqhk.co/xaselavub/fhGSvbc/weather_forecast_transparent_clock_widget.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/fbugjhe/the_east_new_world_walkthrough.pdfIn PDF document text
    • https://cdn.sqhk.co/doxurozupu/Hl689jc/funikub.pdfIn PDF document text
    • https://buvonage.weebly.com/uploads/1/3/0/9/130969236/6562160.pdfIn PDF document text
    • http://usecabinets.xyz/jibogusesewewukevadulator9brny.pdfIn PDF document text
    • https://xonaxogurevof.weebly.com/uploads/1/3/1/4/131453171/3956717.pdfIn PDF document text
    • https://cdn.sqhk.co/disonixures/ehjfOii/livestream_camera_glasses.pdfIn PDF document text
    • http://ceter.xyz/how_to_draw_a_tree_with_branches_and_leaves_easynyghw.pdfIn PDF document text
    • https://numetoximo.weebly.com/uploads/1/3/4/7/134717633/731e8636.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/tutapaxi/descartes_meditation_4.pdfIn PDF document text
    • https://e0bfa911-60eb-4c53-bd8d-ceec25156dfb.filesusr.com/ugd/0a052f_fbe5a261cf084ccfa3ac0db568003043.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/improving_your_handwriting_worksheets.pdfIn PDF document text
    • https://c8f6a2ed-bc8a-4fd4-b26a-19707db7c4cd.filesusr.com/ugd/1cc7e8_75ede95196df4cfe96159d8b50787296.pdf?index=trueIn PDF document text
    • http://nulibipegetoko.epizy.com/does_maytag_own_speed_queen.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/dragon_ball_z_manga_release_date.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/80741743495.pdfIn PDF document text
    • https://e432c3f7-acc0-403b-bc7f-1b8c16782643.filesusr.com/ugd/6a4899_5bd4af718a5c4769a3f55845fa91338e.pdf?index=trueIn PDF document text
    • http://polebofoxajiras.rf.gd/embedded_systems_technical_interview_questions_and_answers.pdfIn PDF document text
    • https://9afb1793-bc57-4514-bb46-74e980466609.filesusr.com/ugd/11f207_9bc521f134ac402fb1f902889ee405a4.pdf?index=trueIn 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_off0000fff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF5 5168 bytes
SHA-256: 909926bc8dff23e8ca9efd50f59a31e455c47d1af8b400844b39db7f1f0968ca
font_01_sfnt_off00011173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11173 11152 bytes
SHA-256: 928496f3d6cdb07e290747b1ee08b49539a066b667ee8dc685ed4c64f48f7410

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