Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd990ddef9af58f8…

MALICIOUS

PDF

72.0 KB Created: 2021-03-23 22:00:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 4d98a3cb4878723363791ca0c615c71b SHA-1: e52c37ee5d07a0ffd0096e9b3c509b163351726b SHA-256: bd990ddef9af58f8405a031a1f0fa8fe6c905d1963d53d7f476a9bcecd127aa4
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable hosting or suspicious domains, suggesting an attempt to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically highlights the use of link farms on disposable hosting, reinforcing the phishing/malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://bologen.ru/strik?utm_term=enclosed+space+word+search+answers PDF link annotation
    • https://fasiwuwazaxeba.weebly.com/uploads/1/3/1/4/131438460/4f743.pdfIn PDF document text
    • http://mebelintera.ru/you_just_dont_understand_evaxvqt9.pdfIn PDF document text
    • https://kewekekonuv.weebly.com/uploads/1/3/4/7/134732265/f8ffdb6.pdfIn PDF document text
    • http://pidawiwosoda.iblogger.org/chauri_mastarwa_se_fasal_re_song.pdfIn PDF document text
    • http://netezasodi.22web.org/agnes_waters_surf_report.pdfIn PDF document text
    • http://unonatur.space/859052541588p1tr.pdfIn PDF document text
    • https://dutosagow.weebly.com/uploads/1/3/0/7/130775111/fa9e42a2e7e81.pdfIn PDF document text
    • http://lazadacostumercenter.com/1994_honda_accord_lx_fuel_pumpa594w.pdfIn PDF document text
    • http://sandiego-podcasts.com/dalawivejotepeu6hmr.pdfIn PDF document text
    • https://cdn.sqhk.co/jezaziritav/Yjbgjii/dimerewegosemadepimeba.pdfIn PDF document text
    • https://cdn.sqhk.co/kupulifip/7hic6oa/hellhounds_rs3_taverley_dungeon.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeform.com/56002879691xnowo.pdfIn PDF document text
    • http://mikazuxo.mypressonline.com/gupiwalosawujololif.pdfIn PDF document text
    • http://bimizuzi.sportsontheweb.net/42572801285.pdfIn PDF document text
    • https://cdn.sqhk.co/xeduwukaxusa/iJvhfZz/likert_scale_mean_and_standard_deviation.pdfIn PDF document text
    • http://avto-trokot.xyz/rasovekugmzj.pdfIn PDF document text
    • http://santecmb-sarl.com/ultimate_offroad_simulator_hack_download78z1y.pdfIn PDF document text
    • https://cdn.sqhk.co/kizulajeli/Iw8UYhi/10806312091.pdfIn PDF document text
    • http://kino-vezde.ru/34946907759tt0g4.pdfIn PDF document text
    • http://ital-tess.space/monthly_bill_organizer_excel_templatemgxk3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tokipobobanokab.rf.gd/fusenusegejikabawawomu.pdfIn PDF document text
    • http://xufizup.rf.gd/chalo_ishq_ladaaye_movie_full_hd.pdfIn PDF document text
    • http://sasezer.rf.gd/jofetaw.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_off0000dc4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4D 5208 bytes
SHA-256: 41990b52c54ced5d04bd603420834787b2d1c501108243f2d27ab3110f819e1b
font_01_sfnt_off0000ee10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE10 10888 bytes
SHA-256: 63636ff145b708cf873df524fb740b57108517f51c2bdf0f2c5fd6c0f8090ef9

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