Malicious PDF — malware analysis report

Static analysis result for SHA-256 59feb84c0d200634…

MALICIOUS

PDF

71.8 KB Created: 2021-03-20 03:59:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf6e2c691df4602874f9f41087b64a71 SHA-1: d9d471c20b8215db7e1594ca99e04a7022ad64d4 SHA-256: 59feb84c0d20063409abbd5547ae94f747859c0db213e955e2cd3d7af06c6042
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. It contains a large number of embedded URLs, many of which point to unknown or potentially malicious domains, suggesting a link farm designed to redirect users to harmful content. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing lure.

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 http://wojesukuzak.mygamesonline.org/94385525270.pdf
    • https://sarununow.weebly.com/uploads/1/3/4/3/134366188/xapufovimixojasa.pdf
    • https://vifegozotamideb.weebly.com/uploads/1/3/4/2/134236473/17202c.pdf
    • http://bukobaxaz.getenjoyment.net/bd_chaurasia_upper_limb.pdf
    • https://cdn.sqhk.co/jawutuwek/QfjdiUO/88536947244.pdf
    • https://cdn.sqhk.co/nemoludajedu/icigFjb/superhero_fighting_games_grand_immortal_fight.pdf
    • https://cdn.sqhk.co/rojozedofaf/ijbgdoQ/39897004351.pdf
    • https://cdn.sqhk.co/rurufimibiwe/hajVhjI/today_s_weather_forecast_for_houston_texas.pdf
    • http://circleshtang.xyz/how_to_calculate_write_off_for_home_officedo0ao.pdf
    • http://moreprodukti.com/serato_dj_lite_download_64_bitpci3o.pdf
    • https://cdn.sqhk.co/nazujovo/ahbCXF1/messenger_rna_vaccine_history.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://feedproxy.google.com/~r/wb/ENAH/~3/bVCGPfG74RQ/wb?keyword=graco%20pack%20and%20play%20with%20changing%20table
    • http://xobibaga.myartsonline.com/ncert_books_class_8_english.pdf
    • https://uploads.strikinglycdn.com/files/372c0332-4d4a-4117-98e6-05ac54c6919d/double_down_slang_words.pdf
    • https://uploads.strikinglycdn.com/files/a96a5e2f-4e1d-4bae-8567-ac2773db806d/97982220745.pdf
    • http://gitojaxekeveki.onlinewebshop.net/english_syntax_analysis.pdf
    • https://b7b9a0d4-d71d-433a-9dbc-8293b1c729aa.filesusr.com/ugd/979434_a22f17f6cee3451992211707a6e059f6.pdf?index=true
    • https://1138278f-e8d0-45ef-aef3-dbdd7428ac52.filesusr.com/ugd/5be868_bbfab299703f4ad4a3f44705becc9e09.pdf?index=true
    • https://uploads.strikinglycdn.com/files/39edb60e-e515-40fd-bb75-9d392b889ffe/what_does_the_bible_say_about_human_rights.pdf
    • https://5f98d79b-b704-4ecc-a618-200e52db7f79.filesusr.com/ugd/d1a5b7_20c6f6a7bd9445ae89413cf692e68594.pdf?index=true
    • https://38aad9b5-7a72-45b8-ac81-9fe73ce82000.filesusr.com/ugd/08338c_ce8cdc9af4634ddebd0b75a2d71345ad.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9eb981d5-f50d-458d-997d-d74ab998aea4/redenukavosuzaba.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8ba.bin
5f3bbb209c4d1628b1fc43193706c786de2a97687da1b1de124f44b43f279ff0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BA 5588 bytes
font_01_sfnt_off0000ebd2.bin
41606d5d01b2a6e25e64112f8d1b217831822a4f8a4d2cae66e2bc91f3be4913		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD2 11196 bytes

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