Malicious PDF — malware analysis report

Static analysis result for SHA-256 da9b8e81d2fdd1db…

MALICIOUS

PDF

80.0 KB Created: 2021-03-29 04:40:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ee6a61d34b07dfeb450e7a8b438c5c51 SHA-1: a464dc1151ec92134a9ec8fdd9d7c0780c579546 SHA-256: da9b8e81d2fdd1dbb906b99c758f15b50853c14f6786d1e2baf66f12ef8aecb8
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document body, though truncated, suggests a lure related to song lyrics, and an embedded URI points to a URL that appears to be a search result for 'imagine dragons believer lyrics pdf download'. This indicates a phishing or social engineering attack pattern, likely intended to trick users into downloading a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://botokaw.ru/award?keyword=imagine+dragons+believer+lyrics+pdf+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4415783/normal_5ff0aa1940899.pdfIn PDF document text
    • http://ziwigosopijulal.mygamesonline.org/teporusesixiziva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480412/normal_604f297571ab9.pdfIn PDF document text
    • http://vuxiparami.22web.org/audacity_windows_10_free.pdfIn PDF document text
    • http://wawewifebobojum.22web.org/zegafo.pdfIn PDF document text
    • http://wagajikis.iblogger.org/bugoxifeguw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413713/normal_605b4a20e18b4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d992f69e-bc5b-430a-92d7-abfd66d0380b.filesusr.com/ugd/6f7357_46e14f9ab8554db6abeab8477cae6255.pdf?index=trueIn PDF document text
    • http://wejajesenopezoj.onlinewebshop.net/bin_sachivalay_model_paper_in_gujarati.pdfIn PDF document text
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_66656615d55749d38107a080053e878c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/benuka/76617661173.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/38248610011.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/nudutotezonem.pdfIn PDF document text
    • https://b7af6bb9-01eb-4839-ab56-764651de4344.filesusr.com/ugd/2486b5_c71f7253b3584dffa9957421372a019c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6440f9a-7ca0-4753-8b0b-03a90624c961/blacks_law_dictionary_11th_online.pdfIn PDF document text
    • http://lumolak.rf.gd/who_is_molly_supposed_to_represent_in_animal_farm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/407ce009-c271-4529-b2ba-f2e15eb550ac/easa_crew_duty_time.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8e24304-f361-4eeb-8d05-b06b029c902c/construction_project_manager_salary_austin_tx.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea509993-c6df-47a8-a697-89654e915846/another_word_for_retention_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d10246c9-a552-4dee-87b1-e6f8cc362a90/hermosas_criaturas_2_pelicula_completa_en_espaol_latino.pdfIn PDF document text
    • https://37bdae34-bb2f-403f-997c-54a7c09d9c06.filesusr.com/ugd/dc98cc_65def844c3af4e2fa021f6a94cdea6f3.pdf?index=trueIn PDF document text
    • http://bapaxezeb.epizy.com/18730210649.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_off0000dba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA8 5808 bytes
SHA-256: 135dad7f092e6c2c428b9b1a2d4323ace090a4d931cb5e7c1d5070253c3c619a
font_01_sfnt_off0000ef6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6E 10200 bytes
SHA-256: 3f3bfdf54180aed9512ccd2e3925a820276c79ad71f75df28248f277b64468cf
font_02_sfnt_off000112cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112CB 18776 bytes
SHA-256: e58e8e8d3617fa2f52d62469859eb662c26c1c1537dc21f5cc6f1aa71eaa6aed