Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2f9dfe3e718dc2e…

MALICIOUS

PDF

83.5 KB Created: 2021-03-23 17:41:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 35214de29521f077a74cd28047f922d1 SHA-1: cb39c41b4e1a80a04fd580b51c0cd55bb4c51ec2 SHA-256: c2f9dfe3e718dc2e1c2bd7a446947a18aa96479977472598b42f0d302a519d7e
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://baarspo.ru/wix?keyword=bloons+td+6+apk+download+android PDF link annotation
    • https://famonusowofem.weebly.com/uploads/1/3/4/3/134349488/1973683.pdfIn PDF document text
    • https://sokuvefababadax.weebly.com/uploads/1/3/1/8/131856373/5d3ee2d1857.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420930/normal_603a2eb8dfa90.pdfIn PDF document text
    • https://melusibisi.weebly.com/uploads/1/3/4/5/134595399/e421752e62e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369773/normal_6051f5f8acdf5.pdfIn PDF document text
    • https://kasezikibojeg.weebly.com/uploads/1/3/1/8/131871727/xowulusotexipalibiti.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489259/normal_60081c2f40ffd.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://uploads.strikinglycdn.com/files/825d2244-dafb-484a-b671-f391274aeda3/pop_fake_book_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91ae561a-ac82-4fc1-8c53-52fab26615a0/japanese_vocabulary_list_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b424fd54-5a31-42da-915e-8da8028bb893/shark_ion_robot_r87_vacuum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b919d6e-ed7b-4c7c-bdac-e92d8e4dd1c0/gikejobutufofugoxasizarog.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/bushnell_tour_v3_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d86adc0e-df20-4d8a-beb6-9ae40a83d36a/qu_fruta_no_puede_comer_un_diabetico.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/boiler_hydrostatic_test_report.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/65879834781.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0533ec3a-f7be-4aba-a2e3-ea0e5bff4987/a_series_of_unfortunate_events_tamil_dubbed_movie_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7826f4f2-cdf4-4616-9a10-4152bec2d79f/wuzifiboxoruzevivuduvi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f29de62-cdc3-4c80-91ca-e37aa64b613d/difference_between_cycleops_fluid_and_fluid_2.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/22295323296.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/fetafufijemiginijedosir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9910e87e-93bc-4738-b553-49166dcca184/plc_programmer_in_coimbatore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32c26dcb-1eed-46be-976a-a8c515685507/gelobenuzana.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/meximoxajupuw.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/48589032049.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/binary_classification.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_off0000fa2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2B 4984 bytes
SHA-256: 0c013839d8bc59ec98477daba452d5e2cc6f2f45de16dcaa5b3d836329af44ea
font_01_sfnt_off00010b31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B31 11496 bytes
SHA-256: 8e23f4c018828c13bce4bbccbf238eff6738c2c88ba65416e5ea16ce970a5a76
font_02_sfnt_off0001325f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1325F 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2