Malicious PDF — malware analysis report

Static analysis result for SHA-256 734a6d06af0d893e…

MALICIOUS

PDF

70.4 KB Created: 2021-03-01 12:00:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f9ec900796a84c457eb67ef9ede183f3 SHA-1: 7997890a5ab05630b955bfe46e273f475cd7dea4 SHA-256: 734a6d06af0d893e8984af8fb6f379a5209c3fe4829b9c5716115579ea707ef8
126 Risk Score

Malware Insights

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

The file is a PDF that contains embedded URLs, with one prominent URL leading to a link farm. The PDF's structure and the high number of external links suggest it is being used for SEO manipulation or to distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://lozipotod.ru/award?keyword=gun+defense+classes+near+me PDF link annotation
    • http://noxaduva.mypressonline.com/lanavolev.pdfIn PDF document text
    • http://figironeme.22web.org/dell_optiplex_790_i7_review.pdfIn PDF document text
    • http://watogoda.mypressonline.com/455033263.pdfIn PDF document text
    • http://aov.one/how_to_replace_an_orbit_sprinkler_solenoidyhpuh.pdfIn PDF document text
    • http://kprovk.xyz/brain_games_tv_show_full_episodesszatf.pdfIn PDF document text
    • http://juvizex.sportsontheweb.net/93269990747.pdfIn PDF document text
    • http://trynutra.shop/pilot_g2_10_pens_office_depot5gn76.pdfIn PDF document text
    • http://yatvoyya.fun/45983641144lz50.pdfIn PDF document text
    • http://lirerigoteses.22web.org/tasewawofulosa.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/zulezov/fiscal_sustainability_report_canada.pdfIn PDF document text
    • http://lonivone.rf.gd/87691794094.pdfIn PDF document text
    • http://misosemarimo.rf.gd/disputing_bad_debt_on_credit_report.pdfIn PDF document text
    • http://roritobefeda.rf.gd/raymond_chandler_best_books_in_order.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/jofowe.pdfIn PDF document text
    • http://pikubub.onlinewebshop.net/how_to_reset_plantronics_voyager_legend.pdfIn PDF document text
    • http://gifimedirawi.epizy.com/les_miserables_book_plot.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/255683358.pdfIn PDF document text
    • http://fubolorira.epizy.com/sutixexadovozexa.pdfIn PDF document text
    • http://julatelowix.rf.gd/aflatoon_movie_hd_video_song.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_off0000d6a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A2 5200 bytes
SHA-256: 57e0fab6297653308964dae9e7b8157acad5bbfcdd18306f4a038146146e9ea4
font_01_sfnt_off0000e845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE845 10516 bytes
SHA-256: 1feff2fb54706a33e40d8ee49e3f92003350733b0df903fd7eb391593ac557b5

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