Malicious PDF — malware analysis report

Static analysis result for SHA-256 8682f37f319fcb6d…

MALICIOUS

PDF

89.3 KB Created: 2021-03-16 08:07:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 5688d0c992fd8a1d26cef658656e125f SHA-1: ab3e8051484cc3dffb5b2226281a2036a5c72872 SHA-256: 8682f37f319fcb6d4683d3afae1ec9cb507bd3099184a945c7a9217bc09fda2e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO spam or phishing campaigns. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing. While no scripts were directly extracted, the PDF structure and embedded URLs suggest a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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=hidden+african+history+pdf PDF link annotation
    • https://menafemudiwifog.weebly.com/uploads/1/3/0/8/130813668/2752622.pdfIn PDF document text
    • https://memelixuluxowi.weebly.com/uploads/1/3/5/9/135958522/1997579.pdfIn PDF document text
    • http://paxezimusosesa.scienceontheweb.net/amortization_example.pdfIn PDF document text
    • http://sutixekume.22web.org/sap_user_profile_role_table.pdfIn PDF document text
    • http://fukazab.mywebcommunity.org/trombosis_venosa_superficial_tratamiento_intramed.pdfIn PDF document text
    • https://lezafopiga.weebly.com/uploads/1/3/4/6/134628758/gomifimonikew.pdfIn PDF document text
    • http://vadosaj.getenjoyment.net/cisco_sg300_default_console_settings.pdfIn PDF document text
    • http://koxelovanalimu.getenjoyment.net/21929749137.pdfIn PDF document text
    • https://vofamebibefa.weebly.com/uploads/1/3/4/6/134694090/24814db66ea34e.pdfIn PDF document text
    • http://xofofumireke.mypressonline.com/16567292721.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/xukanomarexumu/xezobuto.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/basha_tamil_movie_hd_video_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/14511639546.pdfIn PDF document text
    • http://loxupobupibim.atwebpages.com/all_awards_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/3557978693.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/kebuwezi.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/tagalog_mystery_riddles_with_answers.pdfIn PDF document text
    • http://tulajadulixo.myartsonline.com/sermones_adventistas_para_predicar_en.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/performance_appraisal_process_flowchart.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/font_arnold_boecklin_std.pdfIn PDF document text
    • http://jipawivenuzinu.rf.gd/dabijegagunabewenibir.pdfIn PDF document text
    • http://sidepojedava.myartsonline.com/marine_corps_physical_fitness_program_mco.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_off00012028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12028 5272 bytes
SHA-256: f47d4ae41574e085928158e89902bd8bcbee85a9d1dd9115bdfa651bdd18ab1e
font_01_sfnt_off00013223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13223 11244 bytes
SHA-256: b692a7c909b27b6ddab7aedcfe8362c74d54d63d0969d6a212d06361d7840d25

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