Malicious PDF — malware analysis report

Static analysis result for SHA-256 50502f5068b5d00d…

MALICIOUS

PDF

86.9 KB Created: 2021-03-07 09:22:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 841dd5d7a31a05c72a7dc13cbf3fb329 SHA-1: d1ed22325bc119b4d1aa1fd7794f7f7d60e4b45c SHA-256: 50502f5068b5d00dd778c0a346316f6961917c83b8415a6cdc3994f147e0f05f
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The presence of 'utm_term' parameters in some URLs further supports the idea of tracking user interactions with potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://vilenefex.ru/aws?utm_term=how+to+fix+my+primo+water+dispenser PDF link annotation
    • http://drive4mclaneaustell.com/pdf_split_tool77hvf.pdfIn PDF document text
    • http://nibelv.xyz/rerizavumixajusemerimivukdkph.pdfIn PDF document text
    • https://cdn.sqhk.co/kixobaza/ubYThaJ/head_soccer_world_cup_2018_unblocked.pdfIn PDF document text
    • http://marketes.pro/top_10_motorola_android_phonesw4r8z.pdfIn PDF document text
    • https://cdn.sqhk.co/fegukajebaj/ijuNIja/luvin.pdfIn PDF document text
    • https://cdn.sqhk.co/wetabupi/gijmjcL/advertising_success_criteria.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/d1ijc3E/hoverboard_racing_fortnite.pdfIn PDF document text
    • http://stalekost.site/xukosixajurujekadiwest6zav.pdfIn PDF document text
    • http://zubiki.top/what_is_the_difference_between_effectiveness_and_efficiency_in_managementa0ssp.pdfIn PDF document text
    • http://new-leggins.site/53872697899p05ry.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/abb2f206-bbff-4024-ab40-b9ce4af7a5bf/best_movie_maker_app_apple.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d988bd1-5b10-4b3d-a444-7c996ee62830/59040817847.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/786f3534-f7a9-44e4-833a-102cd20d3380/kezibetinepuv.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/zasowigimijipiwobomaruxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64f7eeb3-593e-4696-8ad6-79d46ff02e79/que_tipo_de_archivos_lee_el_kindle.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/36243245176.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfc65a17-d815-43ab-8e1f-70a05af3e72e/real_heart_drawing_easy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3ec6ac4-303e-45b2-a313-5ffd0b382282/23420418937.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/dream_on_dreamer_album.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/413d8a1c-026b-4549-b360-2be704b84a32/matlab_simulink_tutorial_videos_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6beacf28-e1a6-4761-a815-5fd8781cfd06/book_of_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5a6bdc6-e25f-416e-ac63-498a32a2c15d/clicker_keypad_does_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24f6f471-b6a7-4b4e-b483-3ba1063e7d26/wepitunanokarejik.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_off00011810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11810 5380 bytes
SHA-256: f541bcbc2c540d12129f5defe24a82d4cbd6d11daef080e37004da3ebbe82de9
font_01_sfnt_off00012a63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A63 10504 bytes
SHA-256: c726b7dbff7d948a95268e45ed99c67c4231d8ebeb1c3e2d0ee88913fe92e4c2

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