Malicious PDF — malware analysis report

Static analysis result for SHA-256 599499e5c663f7d0…

MALICIOUS

PDF

82.6 KB Created: 2021-04-05 20:52:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: bb9e71c754cd5464252b628afda21a45 SHA-1: 77ea8f3674aac2e753647fa0222a47ea57b06ecc SHA-256: 599499e5c663f7d0a0a095ca67349f4617b54ab20f8ef973e9b91434962bac22
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier further indicate malicious intent. While no scripts were extracted, the presence of numerous external URLs points towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://golowaki.ru/strik?utm_term=mtd+riding+mower+carburetor+adjustment PDF link annotation
    • http://nogeturafo.sportsontheweb.net/vazaxadivitonijenajuzuxe.pdfIn PDF document text
    • http://zefujixa.mywebcommunity.org/apprendre_a_lire_en_francais_maternelle.pdfIn PDF document text
    • http://mojadejazisapa.sportsontheweb.net/how_much_is_a_pole_vault_pole.pdfIn PDF document text
    • https://cdn.sqhk.co/kawiwitifa/Ep5icST/stanford_entrepreneurship_summer_program_for_high_school_students.pdfIn PDF document text
    • https://cdn.sqhk.co/luwesefizi/3q7igE6/chicken_invaders_3_christmas_edition_full_crack.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/78661543910.pdfIn PDF document text
    • https://cdn.sqhk.co/dibirolinu/5hjagfk/minimal_wordpress_themes_for_writers.pdfIn PDF document text
    • http://gaxenop.medianewsonline.com/78199544599.pdfIn PDF document text
    • https://cdn.sqhk.co/tatogevi/qibgghe/96159289751.pdfIn PDF document text
    • https://cdn.sqhk.co/vetukalujir/Ajcmija/fandango_amc_24_hamilton_nj.pdfIn PDF document text
    • http://wejesigozolireb.getenjoyment.net/most_important_candlestick_patterns.pdfIn PDF document text
    • http://vixemifojetinag.sportsontheweb.net/novation_launchkey_49_mk2_midi_controller_keyboard_review.pdfIn PDF document text
    • http://zipafaxelati.sportsontheweb.net/86115758358.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/vutame/piredeseruzijavege.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/guess_the_bollywood_movie_name_by_image_with_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/wordpress_administrator_login_url.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/lufetojadetulasipitotobuw.pdfIn PDF document text
    • https://88bec3ce-9cdd-4818-a95b-bcf8ac49d1e7.filesusr.com/ugd/72df48_9e8a1b8046094f528de6e4e9b75dd7c7.pdf?index=trueIn PDF document text
    • https://3f740848-0e57-4b51-8596-564812021bec.filesusr.com/ugd/cbe17c_17c9ec7fa9b2421e8bf64d6c11657b4c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tosego/how_to_write_a_literary_analysis_essay.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/22687262233.pdfIn PDF document text
    • https://s3.amazonaws.com/taguxif/betopedizune.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/tedugajenawijewokixuka.pdfIn PDF document text
    • https://78fc25e8-d533-4ec3-a480-3617e8cc0d4b.filesusr.com/ugd/aa5866_65a1464639bd485aacf3fdbdd1c2b753.pdf?index=trueIn PDF document text
    • https://55963656-6eb1-4b25-bcd5-bb835d65808b.filesusr.com/ugd/0064ae_7fcaf8fc116046caba4ed593f39b92e1.pdf?index=trueIn PDF document text
    • https://7e574f8b-ef34-4833-8dee-b18f3ac9fc91.filesusr.com/ugd/af8ffd_ed6e6469f7494e058196a8084cb94384.pdf?index=trueIn PDF document text
    • http://kikanelomer.onlinewebshop.net/html5_for_dummies.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_off000102dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102DC 5540 bytes
SHA-256: cd36b4c00c72fd699db37e2e7e5fc9c9bf4cf1a38b8b0180e73d6374f30b4cfb
font_01_sfnt_off000115b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B6 11384 bytes
SHA-256: 824c743fca693186ff5eeb4d82586b62b2381236d7c2e5791c4811c030dafd13