Malicious PDF — malware analysis report

Static analysis result for SHA-256 edd30bb972e011f8…

MALICIOUS

PDF

84.0 KB Created: 2021-03-29 02:27:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 16f565acbf9cd5c0545450d14db079db SHA-1: 7740df3b774fadcd8ccb9a04b58eefbda4554690 SHA-256: edd30bb972e011f8d62afce8f98357f665826d3c0300666f8a6cbb2b5c4a1c8e
166 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a notable heuristic indicating a link farm on disposable hosting. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document's purpose is to trick users into downloading a password-protected archive, a common tactic to bypass security scanning. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://dugedepap.ru/award?keyword=como+inserir+assinatura+digital+em+pdf PDF link annotation
    • http://ralugugifoxatir.scienceontheweb.net/zorekiduxoreviwaxo.pdfIn PDF document text
    • http://sivolejujivozul.scienceontheweb.net/gabawumepodaji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487432/normal_6061092edada8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410722/normal_605ef1c6a54e1.pdfIn PDF document text
    • http://gomijexa.mywebcommunity.org/application_of_attachment_theory_in_clinical_social_work.pdfIn PDF document text
    • http://rozujed.sportsontheweb.net/discipline_equals_freedom_book_depository.pdfIn PDF document text
    • http://lozomaneje.getenjoyment.net/canara_bank_po_recruitment_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374022/normal_601db77121a35.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://3175e58c-9db9-4d87-bcb9-15e03531d93d.filesusr.com/ugd/c93210_0bdafdb794974faf9fd1466f5a10d531.pdf?index=trueIn PDF document text
    • https://65d0a56f-4074-4e8f-9acc-29e6f8e8f663.filesusr.com/ugd/37655d_98b5d336c1de4213bd4d499177449c57.pdf?index=trueIn PDF document text
    • http://baxewape.myartsonline.com/kiwobejurevegijemin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7faa6d18-28eb-45ca-87f5-2e5333339404/what_is_cognitive_developmental_theory_of_gender.pdfIn PDF document text
    • https://9ebe8999-295a-4f11-87dc-c96f3e1b46ff.filesusr.com/ugd/8de238_305b4e5cca7c4ea29374009eca5283db.pdf?index=trueIn PDF document text
    • http://sekuwomexapa.myartsonline.com/velisifaz.pdfIn PDF document text
    • https://3dcfbd4a-ef33-49dc-a04a-0aaf5307c30d.filesusr.com/ugd/b47706_978d1a720d6746ae96aa2454884a4147.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b08db1e9-dc61-4b1d-9db8-d0dde4c4dae5/53506899817.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e919f2cc-d2e0-4a1d-afab-5e95e5fb495b/fun_topics_of_conversation_for_couples.pdfIn PDF document text
    • https://c8f6a2ed-bc8a-4fd4-b26a-19707db7c4cd.filesusr.com/ugd/1cc7e8_3912f748aeb2491d9280b9b4d93e2e57.pdf?index=trueIn PDF document text
    • https://299bc67c-4c9a-44ea-852c-18f2d39dca40.filesusr.com/ugd/954c8b_95eaa9f7886544c0856991f1f056cf69.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1df96bf1-4d69-4a16-9380-a6606a425423/79516503631.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a67314ac-a81d-4d2f-9c63-43b24ee1a4d9/chains_book_free.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_off0000f9d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D6 5268 bytes
SHA-256: e684848560e94415e9b6845a7a2284156609b8b7f4c51a22dabdd867c7dbd780
font_01_sfnt_off00010ba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA3 12776 bytes
SHA-256: 3133c70b6b55e0886c3b2cadba1bef60c22617f33ffc40509d85bdbc212ec42e
font_02_sfnt_off000132c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132C5 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333