Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fba7172ce880c97…

MALICIOUS

PDF

111.4 KB Created: 2021-03-18 10:47:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: d22379b401c2d47f73d75ab8a8394293 SHA-1: 3ac5dacea8d4ad73acb0ab38d12c763501e2e0a1 SHA-256: 2fba7172ce880c9775f30884706b00623c708296ed9637ba54702e8800e66c71
126 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with several pointing to potentially malicious domains, suggesting a phishing or malware distribution scheme. The PDF structure and embedded content, despite being obfuscated, are indicative of a lure to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jacksth.ru/123?utm_term=analogue+oscilloscope+pdf PDF link annotation
    • http://salea.site/jematanovebaxekevasw6r2.pdfIn PDF document text
    • http://stat-index-co.com/wixurugijutijp3m.pdfIn PDF document text
    • http://kofojoxake.mygamesonline.org/30930967862.pdfIn PDF document text
    • http://show-visitor.xyz/wonderwall_projector_manualinm43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482413/normal_604017657176e.pdfIn PDF document text
    • http://zomoxoxuriw.mypressonline.com/attachment_style_questionnaire_for_adolescent.pdfIn PDF document text
    • http://kvyovk.xyz/243498645559equz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365612/normal_5ff164678589c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501659/normal_604aaefe2dde6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418993/normal_60088e5a5db56.pdfIn PDF document text
    • http://arnautmebel.ru/forrest_fenn_treasure_location_theoriesvfk8v.pdfIn PDF document text
    • http://vadosixajobirug.mygamesonline.org/82883938855.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414701/normal_5fda2774c33d2.pdfIn PDF document text
    • http://zugasanuko.getenjoyment.net/where_is_the_power_steering_fluid_on_a_2006_chevy_malibu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/fafovixawanali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ed3142a-469e-43b2-bb1f-60ad713e8f47/back_to_eden_herbal_book.pdfIn PDF document text
    • http://vekamodadon.onlinewebshop.net/94646824170.pdfIn PDF document text
    • http://davofunup.onlinewebshop.net/the_care_and_keeping_of_you_1_free_download.pdfIn PDF document text
    • http://wadoromutisagar.myartsonline.com/49461584840.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c45a151-4c0d-452c-bec2-6ddf474f2129/mcgill_abroad_where_can_i_go.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/which_beachbody_workout_burns_most_calories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c315fb01-0861-4b02-ae21-ca68bd5d9714/how_to_install_tp_link_powerline_adapter.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_off0001629a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1629A 5216 bytes
SHA-256: ac779aa554a5b95e5da5c22e4e812299a5f37e2a7d0321ec5239cf6453978288
font_01_sfnt_off00017474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17474 11100 bytes
SHA-256: 54d84616cd53a38feb50c9452d2e348bc3bddce331cb7e82e6b2c4689951e75a
font_02_sfnt_off00019a7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19A7C 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7

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