Malicious PDF — malware analysis report

Static analysis result for SHA-256 78d69daf8262567b…

MALICIOUS

PDF

83.5 KB Created: 2021-05-12 23:10:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 019ac836828c74f5aac52161c39720e2 SHA-1: 9c2437b06cfe5021e1da49a9fca861b9925025f8 SHA-256: 78d69daf8262567b62c712efe533c61779446d9be13409f70c6107f0be959325
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious intent. It contains numerous embedded URLs, with at least one pointing to a suspicious domain ('nipisod.ru') that is likely used for phishing or distributing further malware. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic suggests a deliberate attempt to create a deceptive link structure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/wb?keyword=can%20i%20lose%20weight%20with%20bodyweight%20exercises PDF link annotation
    • http://getyourcredit.info/antecedentes_historicos_de_la_geometria_analitica_personajesrsspv.pdfIn PDF document text
    • http://xufelaketodo.getenjoyment.net/pdf_splitter_download_online.pdfIn PDF document text
    • http://recepty-dd.info/ib_ess_ia_word_countjvhcv.pdfIn PDF document text
    • http://meetsol.xyz/36260084309s9tp4.pdfIn PDF document text
    • http://xtw2.club/free_simple_contingency_plan_template4mzrj.pdfIn PDF document text
    • http://kernig.store/car_stunt_3d_mod_apk_android_1w92i3.pdfIn PDF document text
    • http://nekidifuton.medianewsonline.com/epson_smart_board_projector_manual.pdfIn PDF document text
    • http://bawilidow.mypressonline.com/83383211114.pdfIn PDF document text
    • http://solifixogalek.mypressonline.com/64105039555.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b3e5c30-1519-4202-8462-164f5ef6ef61/fosoroja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/271ae632-3655-4ad1-9a67-12c4ad46c2e1/bose_soundbar_remote_codes_for_lg_tv.pdfIn PDF document text
    • http://mupegutiwigo.epizy.com/rilukapiwewebotil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffc4054a-d786-48ed-b61f-46f42d320918/jugoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a63b15e4-3ff1-4308-982d-5e234a0a9d4e/kimitewapibelubiduf.pdfIn PDF document text
    • http://nabimugupifasif.epizy.com/49891109498.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d796ba1e-5be8-484a-8d35-96aa9daf650e/26731402408.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/915045af-8ace-4ff1-930b-1139698b57ba/a_classical_introduction_to_cryptography_exercise_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bc04c4a-7cc7-476d-b092-fbe3d0327d34/the_angelus_prayer_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44a82554-478f-47b7-9995-8f45da732d22/bodizunozofurogubu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/340564ec-f6ed-47eb-9ab7-e1a3c3b29a15/dulifitetamulozafiwo.pdfIn PDF document text
    • http://wisunabowogus.epizy.com/s_chand_english_grammar_book_for_class_8.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_off00010421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10421 5508 bytes
SHA-256: 8b6bde4e92f0cd6a118ac244e522c4a2685370d02c947533ce092999ea231bb9
font_01_sfnt_off000116ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116EA 11796 bytes
SHA-256: 86faf64842ed8d582f2a1440a527f6120e38997c46f6c78b32745d4620805081

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