Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2bbf0329ff3f99f…

MALICIOUS

PDF

78.0 KB Created: 2021-03-15 17:32:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 522eb95a1863c04371ac4648e468cefa SHA-1: 4d8d39d37976263bb4e905b24d3413ae21fa575d SHA-256: c2bbf0329ff3f99ffc79837c890039992375109807d1194824f8eda5fa5acad0
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to direct users to phishing sites or download further malware. No scripts were extracted, but the overall structure and URL distribution are consistent with a phishing lure.

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 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://golowaki.ru/wix?keyword=cancha+de+basquetbol+en+ingles PDF link annotation
    • http://kayikciakademi.com/vawefurahio47.pdfIn PDF document text
    • https://cdn.sqhk.co/bisuligiga/NpKheMy/browse_button_in_bootstrap_w3schools.pdfIn PDF document text
    • https://cdn.sqhk.co/xesagomi/igid8gc/english_songs_download_free_mp3_download.pdfIn PDF document text
    • http://idealica-italiauficiale.website/moko_folding_bluetooth_keyboardc055p.pdfIn PDF document text
    • https://cdn.sqhk.co/givifevulo/DhjAhhk/42937420669.pdfIn PDF document text
    • http://btsworld.org/char_broil_quickset_grill_manualcs113.pdfIn PDF document text
    • http://gubixazolela.sportsontheweb.net/89904475197.pdfIn PDF document text
    • https://cdn.sqhk.co/wajuvimavofo/enjgghA/ultra_street_fighter_4_pc_requirements.pdfIn PDF document text
    • http://lifeit.pro/wivupopanukajolumog1zs82.pdfIn PDF document text
    • http://idealslimitaly-official.site/76542200629g0ycj.pdfIn PDF document text
    • http://begemot.space/fokipukekezafemuwusevlgxng.pdfIn PDF document text
    • http://fitdieta.com/nordic_theory_of_everythingvnoqz.pdfIn PDF document text
    • http://mbfsopg.com/navien_tankless_hot_water_heater_prices984c8.pdfIn PDF document text
    • http://novonet.online/redox_and_electrochemistry_finding_the_oxidation_state_worksheet_answersf42ye.pdfIn PDF document text
    • http://dragonflysagewellness.com/kudapakajasomimopazugzlj9f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://044ec7df-721b-4788-b209-87474a3fcb06.filesusr.com/ugd/60ffa2_fd1d18fc812a40cbb1809c18193dfa43.pdf?index=trueIn PDF document text
    • https://04934832-22f3-474e-96de-b9d593e92251.filesusr.com/ugd/f390e7_6d88cc26a19e4c5bb138a8f1727a8cff.pdf?index=trueIn PDF document text
    • https://49550882-97ce-44db-a38b-6e383bb81149.filesusr.com/ugd/062c90_d61373a39d884ab6a7e9f572e9225077.pdf?index=trueIn PDF document text
    • https://cda84be5-0c54-4c05-8389-97bb004c798d.filesusr.com/ugd/fa9f00_adc4433aacbd4854959d8011520bb970.pdf?index=trueIn PDF document text
    • https://065b66ee-25d8-4381-b309-094abc4d823c.filesusr.com/ugd/2703e6_0344a8b41a2b44edba764a68133413b6.pdf?index=trueIn PDF document text
    • http://baxewape.myartsonline.com/47238951898.pdfIn PDF document text
    • https://aefbb2f1-1cfc-4a48-aab2-d72547d84173.filesusr.com/ugd/2f3ac6_f5cf7e21aacf4b0e83067ef2ec49f03f.pdf?index=trueIn 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_off0000f144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF144 5276 bytes
SHA-256: 18ecb7f87f59eb896675cae1467ee701ce6fe510110edc8198dad7819cfd14fa
font_01_sfnt_off00010324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10324 11780 bytes
SHA-256: 307260055ea83520fc31a3419fddbb26f09a1834a8b2941cb673fe311a39602a

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