Malicious PDF — malware analysis report

Static analysis result for SHA-256 de8d4c5c22246f5e…

MALICIOUS

PDF

87.5 KB Created: 2021-03-09 13:00:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 224cb5cc2b3a98008476dfd16dbbda35 SHA-1: c98c2c1f8e96e98692a7ce87fb53b0ef8e79ca07 SHA-256: de8d4c5c22246f5e34bd9977a3ace6fb72cede440b70cc118132a980c066afd3
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which are part of a link farm strategy hosted on disposable domains, indicating a phishing or malicious redirection attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior. While no scripts were extracted, the overall structure and URL distribution strongly suggest a phishing lure designed to redirect users to malicious content.

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://xajibur.ru/123?utm_term=badaga+cut+video+songs PDF link annotation
    • https://zaduguwage.weebly.com/uploads/1/3/0/8/130874015/316e67346f9dc3.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwonesi/bhbhdhf/27413734654.pdfIn PDF document text
    • https://fewifaki.weebly.com/uploads/1/3/4/5/134578400/vewifakeber_bukor_wepegabaxi.pdfIn PDF document text
    • http://razvivatel.blog/download_papas_cupcakeria48fiz.pdfIn PDF document text
    • https://zukudanasoxe.weebly.com/uploads/1/3/2/8/132815154/sonajemeki.pdfIn PDF document text
    • https://cdn.sqhk.co/jiwosowo/jbJGgh3/58380397007.pdfIn PDF document text
    • http://instgrmmverifiedbadge.com/how_can_cultural_competence_be_improved_in_the_workplacem02wu.pdfIn PDF document text
    • https://dawoxojukuput.weebly.com/uploads/1/3/4/8/134890950/50c8b124858f.pdfIn PDF document text
    • https://cdn.sqhk.co/gupuwiwi/Qo08Vjj/27245721836.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://juxudawalugevop.epizy.com/intellij_generate_getters_and_setters_template.pdfIn PDF document text
    • http://lulevewutowa.epizy.com/59253957070.pdfIn PDF document text
    • http://perorudo.epizy.com/bodoni_pro_roman_font_free.pdfIn PDF document text
    • http://mujigivufutufu.rf.gd/purutixikinibi.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/english_grammar_in_use_app_full.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/wufemipovovafaxepezufaro.pdfIn PDF document text
    • http://losalevova.epizy.com/fpsc_challan_form_2018_bs_16.pdfIn PDF document text
    • http://bozivexaterem.epizy.com/38428660452.pdfIn PDF document text
    • http://topabezep.rf.gd/what_word_does_not_belong.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/51054586473.pdfIn PDF document text
    • http://lojuwuwa.rf.gd/kendo_grid_tooltip_template.pdfIn PDF document text
    • http://zavonatirudim.epizy.com/puzururopiw.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E0A 4968 bytes
SHA-256: c29e0250a4d0cefa64b7c563dc26d0aef0541d81654ef5ca8be9c2b73068265f
font_01_sfnt_off00011f05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F05 10424 bytes
SHA-256: 5ceca0625cf4ae6d9dfcdd660a49843e41e05595316e079ae1f5609ce60f3225
font_02_sfnt_off000142b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142B0 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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