Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd9e5d56b04131bb…

MALICIOUS

PDF

69.7 KB Created: 2021-04-03 18:57:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: f61c3cc24c21bb777c4104051a0130b6 SHA-1: 5d09b86baa2f3935641ee2d2465b7e6a7ca2db92 SHA-256: dd9e5d56b04131bbdb6355141f21dede989507cebef6c31edf7f2398f65b3274
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically pointing to 'ponafet.ru/award', suggesting a lure for users interested in cervical cancer screening. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to serve a secondary payload. No scripts were extracted, but the presence of numerous external links and the overall detection profile points to a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://ponafet.ru/award?keyword=cervical+cancer+screening+pdf PDF link annotation
    • http://podipotekoi.ru/bee_movie_apk_freea28ba.pdfIn PDF document text
    • http://safilow.iblogger.org/will_future_exercises_perfect_english_grammar.pdfIn PDF document text
    • http://dfwshootersupply.com/what_causes_a_2005_honda_civic_to_overheathav46.pdfIn PDF document text
    • http://mrshadow.net/how_do_i_reset_a_hardwired_smoke_detectorflqaz.pdfIn PDF document text
    • http://rameautbxy.space/white_noise_for_sleeping_rain48vcd.pdfIn PDF document text
    • http://8gusevshop.space/foolproof_module_3_test_answers_quizletkuqlq.pdfIn PDF document text
    • http://jakijofuvi.iblogger.org/47766063134.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lebevinawefebo.rf.gd/bookkeeping_excel_template_free.pdfIn PDF document text
    • http://lepigofogirevog.epizy.com/21827203971.pdfIn PDF document text
    • https://b064d0e4-88d6-4b7e-8087-8ebf790fcba6.filesusr.com/ugd/ca32a8_5ea0df0a792049cfabe40a295ee509f0.pdf?index=trueIn PDF document text
    • https://737c154f-ca75-4484-807d-9d5c19d76377.filesusr.com/ugd/7e84b7_aee243fbca7c4b31bb4930983f1a8c03.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2179ae0-934c-4620-8246-95df94592da9/what_does_economic_growth_mean.pdfIn PDF document text
    • https://b23ebcb4-2e41-4c68-a408-584c84124782.filesusr.com/ugd/5a2446_b39e191c989046ed8605bb8d19b2ed70.pdf?index=trueIn PDF document text
    • http://fojamemu.epizy.com/joomla_templates_helix_framework.pdfIn PDF document text
    • http://seposelub.rf.gd/vukedekosi.pdfIn PDF document text
    • https://ff8eac81-0dee-4da4-b7c1-1dee070544a7.filesusr.com/ugd/2637cf_2705f720c7cf49a29b22d076a4014554.pdf?index=trueIn PDF document text
    • https://8084a2ae-6cfb-493d-8155-0d4219c0f7e3.filesusr.com/ugd/5b3528_9669feea7ab0445e91c6cadc1f653f4f.pdf?index=trueIn PDF document text
    • http://wuzuzifo.epizy.com/wowapolage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cd060fc-0150-484c-8b63-62759c7f6246/faferifu.pdfIn PDF document text
    • http://wajufuful.rf.gd/rest_api_developer_guide.pdfIn PDF document text
    • https://41fe7446-7195-45c8-906d-de5e784989f9.filesusr.com/ugd/e02969_e26118a530a845d9b6a62dbc0d3ae8ea.pdf?index=trueIn PDF document text
    • https://748e62c5-a849-4dff-87e7-3b5f74cb3522.filesusr.com/ugd/0df896_8935c0de3b894247ae10007559b6d58c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3648967-b05b-4403-b9e2-ecf8f105329d/vowavakunufinobaz.pdfIn PDF document text
    • http://misiwoferejisuj.rf.gd/58036908397.pdfIn PDF document text
    • http://tolevekup.epizy.com/coastal_carolina_university_map.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C8 5288 bytes
SHA-256: 2022399bf65ae9729d8d430531f2161b3dffb2478b5800e628a8eefb106771bd
font_01_sfnt_off0000e7d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D7 9860 bytes
SHA-256: da3bd7f146b26e431f430fe4963ef2ecd030e32af89d06676c543cb5e12a115f