Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba5ace763e222dcb…

MALICIOUS

PDF

93.3 KB Created: 2021-03-29 20:05:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbf1f8f48fe5015125a4f9f6c0a3e6d5 SHA-1: bf0b9fdd759adf64a0cc06a7c0b86948d77eb971 SHA-256: ba5ace763e222dcbf8e18d5cbf2900d6e565152b6ef878afc50c5140c1e28bb1
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one specifically identified as a potential phishing lure related to an 'anti-ragging certificate'. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it is designed to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/award?keyword=anti+ragging+certificate+pdf
    • https://cdn.sqhk.co/xotabuti/hTjrTjd/dantdm_minecraft_horror_map_the_librarian.pdf
    • https://cdn.sqhk.co/meradipuwiz/Mtgdhej/48019258712.pdf
    • https://cdn.sqhk.co/dabozijide/etjiidR/59193950010.pdf
    • http://palawawez.mypressonline.com/kipidigutirapukowefotu.pdf
    • https://cdn.sqhk.co/nodujugebi/hiihahf/hill_drive_2_mod_apk.pdf
    • http://gapilojazixo.getenjoyment.net/camp_chef_pellet_smoker_problems.pdf
    • http://jukejed.mypressonline.com/xeperu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://2b12d24f-0c9a-4a32-b427-430aba395f0c.filesusr.com/ugd/6cfe90_c5072b34198548ad8c70165f98941cef.pdf?index=true
    • http://gixejemazob.myartsonline.com/96095280034.pdf
    • https://uploads.strikinglycdn.com/files/6909da2d-5f45-4830-aae8-5404244e3a59/strength_training_program_with_free_weights.pdf
    • https://uploads.strikinglycdn.com/files/3a8d3930-48f2-411b-871a-882f93d2ec34/pigakij.pdf
    • https://s3.amazonaws.com/murudute/54819794190.pdf
    • https://s3.amazonaws.com/lixisariwulo/85068656323.pdf
    • http://madepadejatutof.onlinewebshop.net/8432795758.pdf
    • https://uploads.strikinglycdn.com/files/37bed0f6-bd17-40c5-afa3-d9e893897197/whitfield_advantage_pellet_stove_parts_diagram.pdf
    • https://e8ceee85-86bf-4804-80ab-d7a1511cbcf5.filesusr.com/ugd/38650a_118c629514374291adfb327f7e9f4b27.pdf?index=true
    • https://79e5ec13-148a-49e7-9308-7b7844992bd9.filesusr.com/ugd/1d149b_e3aceacf64a3406da50f88fbb06a8b22.pdf?index=true
    • https://s3.amazonaws.com/mixanaz/11818422630.pdf
    • https://f26e6bca-ce10-4524-9610-ed5ef7c8d48b.filesusr.com/ugd/ac8c68_e130ccd8e748454fa9284d5772c9b81d.pdf?index=true
    • https://s3.amazonaws.com/wizuluworafid/oxford_collocation_dictionary.pdf
    • https://uploads.strikinglycdn.com/files/cbd73fb3-96d7-4c85-8fd9-e7412b0958b5/cross_over_to_the_other_side_of_jordan_lyrics.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000118c4.bin
6df9e02b635c1f5f2a7eccccb778113c41a9fb15c7351ed1c31ea75063823950		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118C4 5100 bytes
font_01_sfnt_off00012a32.bin
df404150b93f3f0f7b5e80e2fe8036207453067e74283ac271ac0dc0c5f05d72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A32 11316 bytes
font_02_sfnt_off000150f4.bin
4d0b7fceb6e0b8544dba10d314310d86ee7e0ac375a8e3b5fd915ca5fa71995c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x150F4 16448 bytes

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