Malicious PDF — malware analysis report

Static analysis result for SHA-256 06e4223b2afa50a3…

MALICIOUS

PDF

75.7 KB Created: 2021-03-19 04:09:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28810798fa6e36c86cef0aed5560dc68 SHA-1: b760a1c9340113ce6255a0c1264d5cbbac80dd77 SHA-256: 06e4223b2afa50a3f9163d10f8c8fa623e47fee602cb3742dee6f3202cff89d8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The file is a PDF that contains numerous external links, with one prominent URL pointing to a suspicious domain. Heuristics indicate a link farm and a phishing trojan, further supported by ClamAV detection. The document body, though heavily obfuscated, appears to be a lure related to 'The Odyssey' book, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/aws?utm_term=the+odyssey+book+10+11+12+summary
    • https://cdn.sqhk.co/gujowaxexag/hbn8jed/toto_toilet_running_sound.pdf
    • https://cdn.sqhk.co/jisokemefaz/grKLggW/pokemon_guys_x_reader_one_shots_quotev.pdf
    • http://penageli.getenjoyment.net/the_american_scholar_ralph_waldo_emerson.pdf
    • http://sizerasadaxer.mywebcommunity.org/1335832670.pdf
    • https://cdn.sqhk.co/rizonozugaj/3heibjv/bus_simulator_ultimate_gameplay_download.pdf
    • https://cdn.sqhk.co/dizukenepu/h5flVfA/saskatchewan_infection_prevention_and_control_program.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6d251753-49d0-4f5b-a278-10ed1cacc9d0.filesusr.com/ugd/5c139a_7ae4241f802f4d1a9e427e83d8eb466a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/aa653d28-bbac-4931-be97-188713ee998a/mowotirikurosapajokidopa.pdf
    • https://uploads.strikinglycdn.com/files/86d3074f-b7db-4324-b67d-ea3d1ed22216/farmall_h_parts_diagram.pdf
    • https://uploads.strikinglycdn.com/files/7ada2ebe-f3db-4320-9c54-2e61150ca5d6/98887317882.pdf
    • https://uploads.strikinglycdn.com/files/484f1bfb-1df3-4e03-a36a-378a9ce77862/how_to_read_your_pulse_oximeter.pdf
    • https://uploads.strikinglycdn.com/files/db56109d-fb30-4483-bf30-bc2c40ce579f/54416153288.pdf
    • https://uploads.strikinglycdn.com/files/fde04cb9-b1ab-46e2-bb55-f2a437607a0a/mobatofixiluwep.pdf
    • https://uploads.strikinglycdn.com/files/37443017-6135-42df-b6ff-646139d6cf3d/fefixemexutifawunuzorufe.pdf
    • https://uploads.strikinglycdn.com/files/490ffc0f-fef3-4f50-ae76-a38361a24bb0/how_to_apply_for_maternity_benefits_in_philhealth.pdf
    • https://uploads.strikinglycdn.com/files/e32191dc-6069-47fc-bb1d-dcbfcb458bf5/40971780756.pdf
    • https://uploads.strikinglycdn.com/files/121164fa-9437-49e3-b9b7-a2803e5b6bab/loniguzagenupumi.pdf
    • https://aa4de0c4-a7fb-47f6-97fe-5721705e71c1.filesusr.com/ugd/824332_57889a050038431a8174fc8b87006378.pdf?index=true
    • https://uploads.strikinglycdn.com/files/696ba592-4b0c-446c-953b-cd2a83f4d851/how_to_replace_battery_in_a_firex_smoke_alarm.pdf
    • https://uploads.strikinglycdn.com/files/313dcd9a-913e-4302-a001-95340ff02141/tipo_de_funcionarios_pblicos.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e691.bin
ee5363d50409a220fa8a5525510bb3e2f824dd778f27b77c6336e9986c4ccd90		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE691 5616 bytes
font_01_sfnt_off0000f981.bin
7e3007c3aef1d57eeb0abde0f9e9765b1be7aa9dd02d7097e6ec3b5254cf18fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF981 11928 bytes

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