Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb257ab489c7700c…

MALICIOUS

PDF

104.3 KB Created: 2021-03-18 23:56:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: b235cbd260e48ced861ed8a8963bfb20 SHA-1: c566f91d952ebca9e51c344f779a1d9983b10e8a SHA-256: eb257ab489c7700cffc5b58be700e93bcda398b14b4a97570690691a440a23ee
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with several pointing to disposable hosting and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a spearphishing attachment, likely leading to further malicious content or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://jacksth.ru/award?keyword=mere+paas+tum+ho+novel+pdf PDF link annotation
    • http://bivisurat.22web.org/hvac_sheet_metal_fabricator_job_description.pdfIn PDF document text
    • http://kumorepo.22web.org/43064875445.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403271/normal_604270505b263.pdfIn PDF document text
    • http://guferesuzas.22web.org/big_data_analysis_with_python_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389074/normal_604d0b184d6b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409607/normal_6007d557cd143.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421341/normal_602264a854bdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454421/normal_601482a256269.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413705/normal_5fe39a6d58054.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502439/normal_600e102346639.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466391/normal_5ffd6b6e55e34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452850/normal_6012e82a01d19.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wosolebaxuwutux.rf.gd/gavisoxopivupude.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83853bd8-fd03-458f-bbee-97a9d9be9ba6/tage_frid_teaches_woodworking_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1ad5125-f6bb-4fcb-9fe8-82d1c1a9186c/anarchical_fallacies_summary.pdfIn PDF document text
    • http://tininababa.rf.gd/68266607025.pdfIn PDF document text
    • http://milibelibagusez.epizy.com/53850663209.pdfIn PDF document text
    • http://dalegesezo.rf.gd/how_to_improve_my_anime_drawing.pdfIn PDF document text
    • http://riduxipilitaj.epizy.com/review_equifax_credit_report_again.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61a31eb0-55e7-4426-b4dc-b8e2aa314195/2006_honda_civic_lx_engine_diagram.pdfIn PDF document text
    • http://kuzipewas.rf.gd/let_her_go_piano_sheet_music_musescore.pdfIn PDF document text
    • http://nuwowafel.rf.gd/90772418819.pdfIn PDF document text
    • http://xogowakowokavuw.rf.gd/sijiwebazedatogilolavedev.pdfIn PDF document text
    • http://dafawesag.epizy.com/performance_parts_honda_civic.pdfIn PDF document text
    • http://kagiwabiluwotel.epizy.com/can_we_e_aadhar_without_otp.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000127c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127C5 6476 bytes
SHA-256: 94c320145ca2f8416457429c8e3963abd65d7ae1fc422bfef73da4ec62109792
font_01_sfnt_off000137ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137CA 5348 bytes
SHA-256: ea486450878ecac71b20d4aa109025c67513787c7b31eb85db5279efd5df99cc
font_02_sfnt_off000149d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149D5 1936 bytes
SHA-256: a8ba320a0ac8a73a5a8cc2c47ba30bd151ec5f51af4d5ac0b9daf85eaa8f1301
font_03_sfnt_off0001531a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1531A 11196 bytes
SHA-256: db9a01fb5610ecd4891ca9ee103775bbaa41f2d1d3310b6db597c495a174b55a
font_04_sfnt_off0001798a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1798A 17100 bytes
SHA-256: 1b54a35ef6357092e442545345ffbdfc3143aa1bb6433e34e54107683e04f4ba

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