Malicious PDF — malware analysis report

Static analysis result for SHA-256 93a224a638cf8c97…

MALICIOUS

PDF

93.5 KB Created: 2021-03-12 16:58:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a2bf5f3c9eff0040fb2861c24276d31b SHA-1: bec8c2902f08a9845e1241d6f2afd7ef21f7aa61 SHA-256: 93a224a638cf8c971289899de05bef8de74fde0fa2c0eca8157ab19e4c420fdd
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains keywords related to service manuals, likely serving as a lure to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 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://nipisod.ru/award?keyword=buell+ulysses+service+manual+pdf+download PDF link annotation
    • https://cdn.sqhk.co/raxoxawupej/fkigaid/zugufojefikow.pdfIn PDF document text
    • http://copyright-infringement.business/free_template_website_bootstraptcr1a.pdfIn PDF document text
    • http://lalat.space/animeflv_one_piece_capitulo_400ea0y1.pdfIn PDF document text
    • http://bijedazilele.22web.org/petty_cash_confirmation_template.pdfIn PDF document text
    • https://cdn.sqhk.co/pasepizut/jjmlUGr/82239953185.pdfIn PDF document text
    • http://duzuxilobovix.iblogger.org/16046192871.pdfIn PDF document text
    • http://senteber.site/lodesajobulagowatokiw9eyau.pdfIn PDF document text
    • http://ryursew.space/brentside_high_school_uniform0gd12.pdfIn PDF document text
    • https://cdn.sqhk.co/kakapoxavu/uiiggn2/insta_story_maker_quick_photo_editor_mac.pdfIn PDF document text
    • http://runojiponavu.22web.org/28824692785.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwumixe/a8Hhhhi/46150112904.pdfIn PDF document text
    • http://bravos-kids.ru/95808838391rhgsk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4182ac07-cd52-480e-bec8-8f06c879a9d4/ipad_mini_2019_generation.pdfIn PDF document text
    • http://maxegore.epizy.com/jagraon_weather_report_today.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/vuwupafokisiwupazaronin.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/oxford_discover_level_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/090d7f39-23d6-4f56-b860-d010449dfd4e/5_love_languages_of_appreciation_in_the_workplace_quiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eb49f49-4a4c-42a9-bd0e-bab7e2cc267b/who_is_the_coolest_person_ever.pdfIn PDF document text
    • https://02664c88-84e5-42fa-aae3-682d3a0d4328.filesusr.com/ugd/39d081_1266c86d76214829be4dadc7d76d3caa.pdf?index=trueIn PDF document text
    • https://c9b0c9dc-51ad-46ec-84b2-dbc26df53712.filesusr.com/ugd/b6f588_498897697e844f8aafe07d1812cf7b0c.pdf?index=trueIn PDF document text
    • https://9526c93a-d340-4dca-b5fd-2864ff0888c4.filesusr.com/ugd/4c3d6a_e4aee94e118542d99e8fdc39281e5451.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d31a6595-f4f7-46de-89d9-6594c4aa4a35/wogalipej.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/95924899713.pdfIn PDF document text
    • http://daxokefi.epizy.com/senotese.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/arcsoft_showbiz_no_detecta_seal_video.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/how_to_use_dbx_driverack_pa.pdfIn PDF document text
    • https://73af689e-4c80-4f62-99d3-7a886641ad81.filesusr.com/ugd/3b5dd9_bcfccab03c3e4a09a1d10d6cd2b861bc.pdf?index=trueIn PDF document text
    • https://92ddf5cc-4ce7-4caf-b117-8241c553a727.filesusr.com/ugd/42bae0_b613568ce7bc477ebefbfcbcb0be3c3b.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AE 13676 bytes
SHA-256: 50a9406cd0849ff7e943b4059c67b2f32fc00e750218b84874cfcf367a1995d1
font_01_sfnt_off00012356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12356 5604 bytes
SHA-256: 38c95a1b18193335d3533be8f467946761757a4b6f05a269494bfd00a2cf0ba7
font_02_sfnt_off0001366c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1366C 15864 bytes
SHA-256: c15b376fdef7f0800869e9cdbe80b6c43ccc5ec9b9ca5453418ba622d3a1cffe

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