Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e4d5193633a433e…

MALICIOUS

PDF

71.9 KB Created: 2021-03-01 14:41:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 7d2c5a33809310f16aebf30d6d2c5ede SHA-1: 532ec305a488bcaf24fd53eb27bf191657e75a1c SHA-256: 0e4d5193633a433ee0e7a24788acd56bbdec9fb5d4c5c44f36950823e64f1822
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are associated with link farms and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the structure and URL patterns are consistent with a malicious PDF designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/strik?utm_term=weight+exercises+for+biceps+and+triceps PDF link annotation
    • http://betijeduw.getenjoyment.net/what_are_the_names_of_the_musical_symbols.pdfIn PDF document text
    • http://connexion-amelii.xyz/roxudagijawituse43m93.pdfIn PDF document text
    • http://gutagige.sportsontheweb.net/how_to_inspect_your_new_home.pdfIn PDF document text
    • http://rafupofamurawaf.mygamesonline.org/55224855967.pdfIn PDF document text
    • http://dorightunion.com/bawesin28waj.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/jciilEu/wepogukutipope.pdfIn PDF document text
    • https://cdn.sqhk.co/fotenulutis/XYXitgg/pizofuj.pdfIn PDF document text
    • http://mujoxoluvisukid.getenjoyment.net/wefigudexowuj.pdfIn PDF document text
    • http://opencabinets.xyz/4385861545xz715.pdfIn PDF document text
    • http://rajukilodagoje.mygamesonline.org/does_family_take_a_singular_or_plural_verb.pdfIn PDF document text
    • http://forajadafogaxuv.medianewsonline.com/gexirojenow.pdfIn PDF document text
    • http://zesenadozefut.sportsontheweb.net/79141351642.pdfIn PDF document text
    • http://gewebufokorilu.iblogger.org/clash_royale_new_cards_private_server.pdfIn PDF document text
    • http://nexofozupugasi.mywebcommunity.org/desenogosi.pdfIn PDF document text
    • http://jarewitof.mypressonline.com/why_does_my_samsung_tv_keep_shutting_off.pdfIn PDF document text
    • https://cdn.sqhk.co/nexasolonit/id5gesn/japan_taxi_apple_pay_visa.pdfIn PDF document text
    • http://iuts.space/79310822394c0na1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rimuvuvipimube.epizy.com/84840626166.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_off0000dc61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC61 5604 bytes
SHA-256: 33c90d1fbe5fe3bb8c6c0f1b963637220b8e066f6cd166b934f5e4a40aee6f7b
font_01_sfnt_off0000ef7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7F 10180 bytes
SHA-256: c5305b20fc6eba24100e8a705c6f3ed3317a3cc126de90101e80670f8bfc9259

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