Malicious PDF — malware analysis report

Static analysis result for SHA-256 075cfeb7143cd208…

MALICIOUS

PDF

89.3 KB Created: 2021-02-16 11:14:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0740dbd6c6e7f16fea5ea17c4d2ad16c SHA-1: 9ebe6c01e6ad9ef8d3a5bf045781b7c5dff87c6c SHA-256: 075cfeb7143cd208ee196c8ebc7ad381cc41c1a561f1f337c19a063f195bf50b
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting services, characteristic of SEO spam or phishing campaigns. The document body, though heavily obfuscated, contains keywords related to 'Fallout 3' and 'weapon textures', suggesting a lure to attract users interested in gaming content. The presence of ML and ClamAV detections further supports its malicious classification, likely involving the exploitation of PDF vulnerabilities to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wix?keyword=fallout+3+wanderers+edition+weapon+textures+missing PDF link annotation
    • https://cdn.sqhk.co/voxedijudibo/ds4BHhd/free_speech_bubbles_vector.pdfIn PDF document text
    • https://cdn.sqhk.co/luwivimexu/ZJ4YJ0e/oxygen_saturation_definition_wikipedia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409826/normal_6029f8b1bd10c.pdfIn PDF document text
    • http://runolive.com/si_decido_quedarme_pelicula_completa_en_espaol_latinocecxz.pdfIn PDF document text
    • https://sufidubiziden.weebly.com/uploads/1/3/4/7/134732268/ae29d9.pdfIn PDF document text
    • http://kvyovk.xyz/13138260564kgdkw.pdfIn PDF document text
    • http://rezltml.xyz/23617663198sy2ky.pdfIn PDF document text
    • https://cdn.sqhk.co/mixenezir/gegcayQ/plants_vs_zombies_birthday_party_invitations.pdfIn PDF document text
    • http://shoop-fh.ru/isi_journal_citation_reports_ranking_pathology4i703.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458856/normal_6000c9d1d9bc9.pdfIn PDF document text
    • https://kakifiku.weebly.com/uploads/1/3/5/3/135347754/fikutisirirawu-noronabepoguj.pdfIn PDF document text
    • https://cdn.sqhk.co/nezusoxe/Igghcgg/98221243354.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386073/normal_5fc5bbfaea6ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471235/normal_602a39031c4c8.pdfIn PDF document text
    • https://cdn.sqhk.co/piwizogir/Ggjdmlt/mermaid_skins_sims_4.pdfIn PDF document text
    • https://zajodufukotu.weebly.com/uploads/1/3/1/8/131857357/97b15a5019.pdfIn PDF document text
    • https://cdn.sqhk.co/fulaxanew/OTQihc8/rekopukomanutisiwoj.pdfIn PDF document text
    • https://bonopabugo.weebly.com/uploads/1/3/4/5/134581776/jasuxudimoj_tefasanege_sifodufupar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407060/normal_602b5cb723e1e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00011d18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D18 5556 bytes
SHA-256: 0740f4d31571357a7752c8fa0021451d5d648795bc6d5857fa38aabc8aa863af
font_01_sfnt_off00013007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13007 12264 bytes
SHA-256: acbbf3c213fe1b5643fadac8ab827700131865ca8449a33ae8ed4f3e90cbcad2

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