Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c95c0d4ed847404…

MALICIOUS

PDF

76.4 KB Created: 2021-05-16 14:13:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 0ac658c37649b6a0356091d90cf95c2e SHA-1: e9a45f55a2d6deb25d1b3be3209fce85f0b4240b SHA-256: 0c95c0d4ed8474048a38bc80df119c749e57e03fdf87f6121bb6e53e066bed26
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one pointing to a suspicious domain (jumiwimov.ru) that is likely used for phishing or malware distribution. The document body, though heavily obfuscated, suggests a deceptive lure related to conjunctivitis, further supporting a phishing or social engineering attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/strik?utm_term=como+nao+pegar+conjutivite PDF link annotation
    • https://cdn.sqhk.co/ragojagef/eijhfhe/fnac_shadow_candy_jumpscare.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/gfjhHEq/gesture_lock_screen_download.pdfIn PDF document text
    • http://dajobod.getenjoyment.net/automate_programmable_industriel_siemens.pdfIn PDF document text
    • http://felagem.getenjoyment.net/radical_candor_espaol.pdfIn PDF document text
    • http://rubewox.sportsontheweb.net/psychology_in_your_life_second_edition_apa_citation.pdfIn PDF document text
    • https://cdn.sqhk.co/nixenexax/hmGhiha/96422158392.pdfIn PDF document text
    • http://poxumanavofeboz.scienceontheweb.net/how_to_uninstall_hulu_on_lg_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/samekikogeri/gdzxif5/navajupig.pdfIn PDF document text
    • http://xolokeminapi.getenjoyment.net/tratamiento_de_ascaris_lumbricoides_en_nios.pdfIn PDF document text
    • http://pasadurasasagi.medianewsonline.com/budgetary_policy.pdfIn PDF document text
    • http://rasazajafatirek.mypressonline.com/jewejibi.pdfIn PDF document text
    • http://bukuminuwakub.mypressonline.com/27155564301.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://saduxax.epizy.com/anne_marie_do_it_right_free.pdfIn PDF document text
    • https://8b2103c5-345b-48fd-98e3-f19c90c4efd0.filesusr.com/ugd/0e2875_f6ad18db5096448db5a7c14e1f13df1e.pdf?index=trueIn PDF document text
    • http://polabufu.myartsonline.com/lowadozofefelogumob.pdfIn PDF document text
    • https://ae8c1479-5121-4009-b0ed-8259dbb1205b.filesusr.com/ugd/0aff45_8150b9e89d2342e6b198d8d65eca6bb6.pdf?index=trueIn PDF document text
    • https://7c8f45b7-e058-4e27-bccd-8ee7dcb26900.filesusr.com/ugd/d5cf39_ba537a396ef94207ab1ba41df788c30f.pdf?index=trueIn PDF document text
    • http://tawenaxogiminax.epizy.com/xutikin.pdfIn PDF document text
    • https://143c7e3e-1a56-4739-9c24-5aac26b0263b.filesusr.com/ugd/28d7c1_832cc15ec2d945d5b8bbc7451a0f5b7f.pdf?index=trueIn PDF document text
    • http://kusababi.onlinewebshop.net/startup_business_plan_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc094c4a-9f99-4544-8aab-daf6ee1c348e/pipelines_in_north_dakota_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/451343f5-39fe-4c9e-bc11-c85281fd7217/what_does_uber_use_for_database.pdfIn PDF document text
    • https://9b704b87-3668-414c-a24e-b30400fe0e33.filesusr.com/ugd/51c472_ec009f6b31c142689807344d93af13c4.pdf?index=trueIn 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_off0000ec22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC22 5084 bytes
SHA-256: ffdbd27e12cd3af25ec08f99ec0be0b88473cf11a1b4571473b6afc2d4f1d8b8
font_01_sfnt_off0000fd65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD65 12272 bytes
SHA-256: 2855b3ca3d6795949070adfce2cd2bfe68e28ea0c6823407b896a2afa89bbcbb