Malicious PDF — malware analysis report

Static analysis result for SHA-256 e906f581b338706d…

MALICIOUS

PDF

78.4 KB Created: 2021-05-07 06:31:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 47271817f34cb8eb0e4237e84b04b5e2 SHA-1: c640649e7d329336c2474f8f969da008fe739a37 SHA-256: e906f581b338706db3ecc670ee69f972d2e7c96e1aed7d46640f9cf64c5b55fc
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with one prominent URL pointing to a suspicious domain associated with phishing. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of embedded URLs and the overall structure suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=waterpik+water+flosser+ultra+price PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386349/normal_601855c4b8325.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478383/normal_5ff49dcf148a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500189/normal_60483a3b58a9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_603ff56b19d0f.pdfIn PDF document text
    • https://cdn.sqhk.co/guzunilepin/hagenar/55365633367.pdfIn PDF document text
    • https://cdn.sqhk.co/vabolepibe/Yiigez5/battery_charger_for_car_autozone.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://91953a53-6f32-4f2a-9b2e-0f954541ff31.filesusr.com/ugd/dad90e_6c8031299a2644dcac8b9f5ae2c676a1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/sense_and_sensibility_chapter_35_summary.pdfIn PDF document text
    • https://20996a60-9695-4f45-8fdb-44bdc783da55.filesusr.com/ugd/c57cae_69092d918cda4927ab9e8ea43cbb90f3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a052926-c324-4291-9e47-347ec45d391d/active_and_passive_voice_worksheet_class_7.pdfIn PDF document text
    • https://f1c0478e-57b3-422a-b8eb-433964b677d2.filesusr.com/ugd/16c17d_db25bb55534d4db3a5c8b9af5ae22937.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nitatotol/what_book_comes_after_a_court_of_mist_and_fury.pdfIn PDF document text
    • https://550dfcec-0280-4316-a0d5-68b74a7a20b9.filesusr.com/ugd/f59309_57427902660d499d9a71e013b77cee0a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/46851735863.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/33431554166.pdfIn PDF document text
    • https://cf176ec6-4820-456b-adf9-61e5f06c968f.filesusr.com/ugd/43d598_f5f79f8c5d744de6bd748b4023f7e0b6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/kalijeto.pdfIn PDF document text
    • https://025b4bf0-2906-4f5f-8a0f-6d4b68fc9518.filesusr.com/ugd/148ee2_f0be83190c474d29919dc2ea6923a3d9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f899d9be-fa81-4ed4-a202-9e9d21f94e8d/ancient_magus_bride_episode_22.pdfIn PDF document text
    • https://5e3b32e6-a537-4a58-a531-ef303a468713.filesusr.com/ugd/120874_7d4d292224934653b48af4f7f07d28a4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8769cefe-c0f9-42e4-b2b5-b41d9ae7daca/how_to_hook_up_wally_receiver.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_off0000e791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE791 4952 bytes
SHA-256: 3013ce178c2625feb143971b8e2a20ea583cea2c7c39cd79e2ca77741d917d3f
font_01_sfnt_off0000f89e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89E 10900 bytes
SHA-256: 0b69eaadf1b98a670bf7cf1c5555255358d5e485bb2ad6b5d32e1f25fbcca246
font_02_sfnt_off00011df6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF6 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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