Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d90ed0d2094688c…

MALICIOUS

PDF

72.2 KB Created: 2021-03-19 01:01:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 01ad486e6b7dc06fed4e8d6a30e8b9ec SHA-1: 42b28d32a49bf181b1ab83a5fefe8a6b0db99667 SHA-256: 8d90ed0d2094688cab4536ab21d61b38b92211e1ead2179abeb636860a7c08b9
126 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, with one prominent URL disguised as a search result for 'Hoke high school phone number'. The PDF's structure and the presence of many links suggest it is part of a link farm designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/wix?keyword=hoke+high+school+phone+number PDF link annotation
    • http://microbladingeyebrowsdallastx.com/is_blender_used_for_3d_printingbi121.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467005/normal_603130330e85a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427273/normal_60133fa710983.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379744/normal_6028689e600c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488116/normal_600648ee89bca.pdfIn PDF document text
    • http://rilomenininun.getenjoyment.net/rotoduromowofogimotopuxo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451744/normal_5ff7810e2fb6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413007/normal_5ff864b4e2711.pdfIn PDF document text
    • http://gakmancreatures.ru/technical_analysis_ideal_for_beginnersx1r4z.pdfIn PDF document text
    • http://blognews.top/history_of_western_philosophy_bertrand_russell_table_of_contents9f54n.pdfIn PDF document text
    • http://mizebojusur.mypressonline.com/beautifully_said.pdfIn PDF document text
    • http://tiwegopoguxuzu.mypressonline.com/parliament_limits_the_english_monarchy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499972/normal_6027af2197aba.pdfIn PDF document text
    • http://bodaweziwov.mypressonline.com/sword_art_online_alicization_characters_names.pdfIn PDF document text
    • http://lobabinuladeri.medianewsonline.com/textes_apocryphes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jikelaxapexa.onlinewebshop.net/maha_kala_bhairava_stotram_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc06fb11-82d8-45e4-b8a4-83e193304dc9/transition_words_for_closing_paragraph.pdfIn PDF document text
    • http://kivarutumo.myartsonline.com/how_to_set_poulan_carburetor.pdfIn PDF document text
    • http://kopolug.myartsonline.com/44234271388.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63c9d150-6b94-4920-a70e-afd95868caa1/as_a_man_thinketh_so_is_he_nlt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc60987a-1eeb-49df-95dd-14e01dcd1ef0/79462102346.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_off0000df05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF05 5304 bytes
SHA-256: 5dd199ae8a973ca7835e05b8e5df65647d34babbdead49a394291243c4141605
font_01_sfnt_off0000f0ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0ED 10080 bytes
SHA-256: 54e36828d4b2007c0d5f81e130e5dd59661e3d4054739c92ffaaf229872c0a77

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