Malicious PDF — malware analysis report

Static analysis result for SHA-256 89866dffa2b37be2…

MALICIOUS

PDF

151.4 KB Created: 2021-03-20 19:03:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 18c290c6b14b7516eb8721ce390ebfb0 SHA-1: da1c1c388103bf41ede3f43d2d90f2bc8f23afc7 SHA-256: 89866dffa2b37be293ec9329ad007ea638238d7c0f923cc5df2831509cddc906
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into visiting a phishing or malware distribution site. The document body, though heavily obfuscated, contains keywords related to the URI, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dugedepap.ru/award?keyword=nanomaterials+introduction+pdf PDF link annotation
    • http://nesobaka3.xyz/73663312381igjwl.pdfIn PDF document text
    • http://azorocheat5.xyz/518947229087i53r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460944/normal_602a46e3c2940.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482219/normal_604b7976569a1.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/d55363f9-3fc5-4b3a-8a02-8af3f586dff1/how_to_write_a_estimate_proposal.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/anatomical_positions_and_planes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1671b0f1-ae0e-4c48-8110-78ba9eb09599/celebrate_recovery_step_study_book_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c1b5477-8d18-4a77-b275-1f1fba9563ab/how_to_install_cosco_infant_car_seat_base.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ebf7145-7f29-4201-89d5-86f1ab19a655/who_is_raziel_in_nfs_heat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7deebef-9d20-478b-ab1b-4e50d0782c3e/kali_linux_for_raspberry_pi_zero_w.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/tadasexe.pdfIn PDF document text
    • https://caf0f927-206f-4b4e-aa34-0dd3da53679b.filesusr.com/ugd/83d902_7d7126adc99c4ae090e825f7bc0b3ed4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcd47c17-8554-441c-a7f0-84ae532f2e82/osha_requirements_for_construction_sites.pdfIn PDF document text
    • https://8b5ac0f3-2bc4-49a6-9a99-2541af31b215.filesusr.com/ugd/f2ef67_450230afd4ed43a8bfb4a76ee303093e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd6295e7-40a1-48a4-a82d-ea946a9cc251/firehouse_subs_hook_and_ladder_salad_nutrition_facts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccfb63d1-1abd-434f-97a6-785a0a1c0abe/30397454100.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf2015b2-afaf-47a3-9251-a5a1d7590797/las_chicas_de_alambre_resumen.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/11035592622.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001fc8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FC8A 5268 bytes
SHA-256: ee9c2ca87b7e44e607a0f63564369fc86cf1a112fdf631b561153bec46d97c9e
font_01_sfnt_off00020e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20E63 14160 bytes
SHA-256: a629f56aad24d335529b71376c7e15759f2e73270736a25a991bbd7cc2e11926
font_02_sfnt_off00023b1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23B1B 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7

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