Malicious PDF — malware analysis report

Static analysis result for SHA-256 9155d4a4c28979b4…

MALICIOUS

PDF

84.8 KB Created: 2021-05-02 04:51:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 67e072470efa42ccdee43f95903a0b0d SHA-1: 9f42b6d0258b20b365ba6e93e8b180a99b708e0b SHA-256: 9155d4a4c28979b4f7a3e07f58d0ac0467f5d044b0218c6fb845def8a1552de3
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary external URI pointing to a suspicious domain, suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm on disposable hosting, further supporting malicious intent. Although no scripts were directly extracted, the PDF structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://seumenha.ru/strik?utm_term=albert+camus+free+pdf PDF link annotation
    • https://gilowowiwojet.weebly.com/uploads/1/3/4/3/134314399/jofujiv.pdfIn PDF document text
    • https://cdn.sqhk.co/renapudovi/ighg9js/plotting_points_worksheet_kuta.pdfIn PDF document text
    • https://cdn.sqhk.co/zesokepewami/jhjbPSJ/geometry_standardized_test_practice_workbook_answer_key.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407576/normal_60345d3499473.pdfIn PDF document text
    • http://jezonikiroka.mygamesonline.org/biblia_reina_valera_1509.pdfIn PDF document text
    • https://wimazuwog.weebly.com/uploads/1/3/0/7/130740080/gifefen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448995/normal_602778be5294b.pdfIn PDF document text
    • https://naxizugopigonav.weebly.com/uploads/1/3/1/4/131408516/fixawuvusam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471234/normal_5ff3bf91f0b39.pdfIn PDF document text
    • https://cdn.sqhk.co/nowonipewo/dhaYPif/kiganaginidi.pdfIn PDF document text
    • https://vebusigatibata.weebly.com/uploads/1/3/4/3/134321359/7647756.pdfIn PDF document text
    • https://jurijibo.weebly.com/uploads/1/3/0/8/130874645/1819151.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojiranat/WoicidC/sap_basis_full_notes.pdfIn PDF document text
    • http://nemagufi.mywebcommunity.org/albedo_of_earth.pdfIn PDF document text
    • http://bumumapa.mypressonline.com/champion_power_equipment_40065_generator_wheel_kit.pdfIn PDF document text
    • http://wusokamojifel.scienceontheweb.net/balancing_chemical_equations_examples.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://s3.amazonaws.com/feborobegibew/how_to_setup_pioneer_receiver_vsx-521-k.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d725791-efa4-4a6f-b050-db9467c16448/kenmore_dehumidifier_troubleshooting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11d77a42-8667-4b86-9914-5d5974ab86b8/19119381523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64739e71-9aeb-48d2-bd7f-459c8ae669b3/26394544735.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/common_app_essay_format_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50075e95-2b71-4578-9740-0fbe8172854a/is_canon_200d_worth_buying.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/petg_filament_spec_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/356f8a73-e73e-4239-bc94-dd0f1028c563/lg_smart_tv_camera_price.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_off000101f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F8 5048 bytes
SHA-256: 3451e2f011a9b8ec3ced631a46701c0c8ed41836d1a2c40c8f1f4df02be9913b
font_01_sfnt_off0001131c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1131C 10640 bytes
SHA-256: be6f6b39749e12395d674556b65fdaa4d84d44bcdda30b4d40363d63806c28c6
font_02_sfnt_off00013736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13736 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230