Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ea68e18a469d962…

MALICIOUS

PDF

74.7 KB Created: 2021-04-02 17:27:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 8d5e2e541fe6894820cd01ddacec4faa SHA-1: 7c0798caf2b3a1ab5baa8228863ed7fa9ce5ff0b SHA-256: 2ea68e18a469d962f0306fe47fe1c3779033c6936460038dcfc68cc11b369696
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains and link farms, indicating a phishing or malware distribution scheme. The presence of external URIs and the ML_NYX_PDF_MALICIOUS heuristic strongly suggest a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/award?keyword=add+text+to+pdf+adobe+acrobat+pro+9 PDF link annotation
    • http://opt15.ru/why_is_my_electric_oven_not_heatingys1jn.pdfIn PDF document text
    • https://cdn.sqhk.co/todusukiraxi/YerL1At/69631304179.pdfIn PDF document text
    • http://cosmeteca.com/xupetowozogitojulowj3rip.pdfIn PDF document text
    • http://love-your-lips.online/free_icloud_unlocker_for_windows_10xng3b.pdfIn PDF document text
    • https://molisemopum.weebly.com/uploads/1/3/1/4/131437834/567735.pdfIn PDF document text
    • http://xefemile.22web.org/23359505833.pdfIn PDF document text
    • https://cdn.sqhk.co/pafatewodoju/jiliepa/free_movies_on_youtube_action.pdfIn PDF document text
    • https://nakafafokebupop.weebly.com/uploads/1/3/1/4/131437029/5421590.pdfIn PDF document text
    • https://cdn.sqhk.co/tobipamu/rhaiejd/18039307752.pdfIn PDF document text
    • http://premial.su/chemistry_a_molecular_approach_4th_edition_citationf06f8.pdfIn PDF document text
    • https://cdn.sqhk.co/fedelubu/Zjjgihd/makeup_palette_meaning_in_english_to_urdu.pdfIn PDF document text
    • https://jotipipadazazo.weebly.com/uploads/1/3/4/3/134319758/runubutikonubufu.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/towutoginadivu/beat_the_chasers_contestants_list.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/canada_crs_reporting_deadline_2018.pdfIn PDF document text
    • https://ee60c613-3dd1-430d-b711-08e3dcbf0273.filesusr.com/ugd/19ce5d_f3d7bcd0274b4e4f9a55643460893284.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mokamoba/form_button_disabled_javascript.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/happy_birthday_song_bollywood_latest.pdfIn PDF document text
    • http://moximavekujalel.epizy.com/black_and_decker_rotisserie_convection_oven_reviews.pdfIn PDF document text
    • https://e06e8306-d71e-4c92-aa1b-e8c52eeb44cb.filesusr.com/ugd/bc4951_3a733b0d2d2d4621a7448f822c06b66b.pdf?index=trueIn PDF document text
    • http://vugikalijuboxo.epizy.com/berklee_performance_center_city_and_colour.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_off0000e6a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A4 5292 bytes
SHA-256: 0919a88531d0d1c9438cf69f7194dc5472975d958f797278b3c367532ed3f3d3
font_01_sfnt_off0000f8b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B5 10788 bytes
SHA-256: b01ba9b3f6e63b07db2bf415385a276dec67d44c37e282b156f01053ba623ad5

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