Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a0573743c8f2bef…

MALICIOUS

PDF

89.8 KB Created: 2021-03-05 13:10:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 686e69f08d8ac886e52deb7f2003cc93 SHA-1: 5094762f2b5e21de897d05784726e10622aaabcf SHA-256: 2a0573743c8f2bef01bd5228044beba8393b5927ecea16ed21acbf83afcf8a00
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, pointing to potentially malicious domains. The presence of ClamAV detection and ML classification further supports its malicious nature. While no scripts were directly extracted, the structure suggests an attempt to redirect users to external content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://xezojetit.ru/strik?utm_term=likert+5+point+scale+examples PDF link annotation
    • https://cdn.sqhk.co/vizodejo/jbghhfE/ninja_voice_crack.pdfIn PDF document text
    • https://cdn.sqhk.co/dasofuduveje/esg9jgU/disufeludefata.pdfIn PDF document text
    • https://cdn.sqhk.co/polidupokasu/KiaadRJ/discounted_cash_flow_calculator_excel_template.pdfIn PDF document text
    • https://cdn.sqhk.co/xegunorasu/ujahi0m/43555183114.pdfIn PDF document text
    • https://cdn.sqhk.co/zifiguwosu/hBnCjaJ/photo_collage_app_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://98be45bc-63b9-4117-aff7-84a3d4f2c4a0.filesusr.com/ugd/90c678_691b7bf69e0c49bc9051dea17bf64f0e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/figidireki/luzun.pdfIn PDF document text
    • https://9e705916-5bde-4eb8-be9b-8b3e910fbaf8.filesusr.com/ugd/c7a620_a020aede10da43d29dd42751387b90d8.pdf?index=trueIn PDF document text
    • https://f62823ea-e863-4eb7-bd7c-e3bac0139ff1.filesusr.com/ugd/8c639a_587ba7e5f7e14fd7941480a481107aae.pdf?index=trueIn PDF document text
    • https://d8ec88ce-93b1-4b83-b294-7016fd5b5063.filesusr.com/ugd/366252_3c067dc2bb9249e98b127a785e16636c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/arcade_games_free_for_windows_8.pdfIn PDF document text
    • https://6c8027e1-9878-41b3-a9ef-32ba2b6bcd02.filesusr.com/ugd/185811_dd65ffd4bf1b4a55a0fdbb855aed54f0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/29797136791.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/photosynthesis_worksheet_answers_part_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/intangibles_example_balance_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/90890490567.pdfIn PDF document text
    • https://2b81f3f0-3f46-42ff-87a7-5865dd96cd3c.filesusr.com/ugd/fb41f9_b71c401f77b14046a49d7133ada84cb9.pdf?index=trueIn PDF document text
    • https://00c0516a-c822-4344-a779-6f74e039753d.filesusr.com/ugd/9e41f0_017b11fc068a412d853c3935ccfd4ac3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/jesupilusosijegojapumajem.pdfIn PDF document text
    • https://bf808793-8b46-4c54-8b11-319763181fa0.filesusr.com/ugd/0d018b_ec79e45d45b44cb7b8def323c2b843ea.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/inspirational_quotes_and_sayings.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/rukitotuwizoruribajejinub.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/kuccps_admission_letters_uon.pdfIn PDF document text
    • https://bf6af823-cb0d-4ee8-9d5b-4f0b1de5ed24.filesusr.com/ugd/9eb187_fa7046a6be6c42c6acaf9ef19731c683.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bulozor/gaduzonegamegapazebapu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001135e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1135E 5064 bytes
SHA-256: 8fd35d78789bc1961ad5360580e274a435cdfd9c21aeafdaa7ccfd8ec24085cf
font_01_sfnt_off0001247b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1247B 11532 bytes
SHA-256: bb1307553637c50355b3fd6d02a57e23ff055301e10c696d7ff7723d2f3dc21f
font_02_sfnt_off00014b2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B2B 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3