Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d5f6d7713eeca2e…

MALICIOUS

PDF

74.4 KB Created: 2021-04-03 23:20:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a0c48382c5a9bdc97d7359d00ac579e0 SHA-1: 0fa6eeef1eeb9c97adc5f7862fe10cbd0464a261 SHA-256: 8d5f6d7713eeca2e270462f0f6757671404a19280481d0ed4a092cdd1167b514
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 point to disposable hosting and are part of a link farm, indicating a phishing or SEO poisoning attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document 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://gimoguvi.ru/wix?keyword=art+therapy+sourcebook+pdf PDF link annotation
    • http://kepogosibasenip.iblogger.org/makalah_basidiomycota.pdfIn PDF document text
    • https://cdn.sqhk.co/rizitewav/WhegdxG/genobopabaz.pdfIn PDF document text
    • http://midakurapujif.mypressonline.com/pejaragunemupixezulexu.pdfIn PDF document text
    • http://jedilinosur.mywebcommunity.org/sejixupavimapalokek.pdfIn PDF document text
    • http://davupopebuwiser.sportsontheweb.net/69352972335.pdfIn PDF document text
    • http://bimonetejatoleb.mygamesonline.org/to_the_lighthouse_stream_of_consciousness.pdfIn PDF document text
    • http://xasawidujilade.iblogger.org/brushing_teeth_technique.pdfIn PDF document text
    • http://mowefopovog.mywebcommunity.org/41442804210.pdfIn PDF document text
    • https://cdn.sqhk.co/madufuxenuw/jigihij/58701231470.pdfIn PDF document text
    • http://vuruvuzivad.22web.org/55135416915.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://davofunup.onlinewebshop.net/ritisexonidig.pdfIn PDF document text
    • http://timodetunidup.epizy.com/kizol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efff6173-f83c-43e8-8705-00e0a0549be8/the_power_of_i_am_audiobook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99481c9d-af68-4c18-8d43-c83c558408e9/words_that_start_with_post.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c045963c-c6b8-431b-bf44-8eab99737738/xesuvimi.pdfIn PDF document text
    • http://xonatude.epizy.com/arcane_legends_mod_apk_2._5._2.pdfIn PDF document text
    • http://pexoroxijaseduj.rf.gd/is_canon_powershot_sx540_a_dslr.pdfIn PDF document text
    • http://raxitipigatar.epizy.com/panelview_800_configuration_mode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7575d17-a03d-49b1-9ac4-42aed87054be/gta_5_pc_cheats_remove_wanted_level.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_off0000e30d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30D 5504 bytes
SHA-256: e3bd8420193eee693b904162fb8135a458ee3d68e104524123065fbf5f8a3673
font_01_sfnt_off0000f5c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C3 10888 bytes
SHA-256: c25210788540fd73e3bced1934f086a8b255a187fda7a01a6fcf76ef9b505d73

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