Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b26ad93a005b69e…

MALICIOUS

PDF

81.9 KB Created: 2021-03-18 17:33:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 3824b4c1f0bfb15b1f84f6186e0698c2 SHA-1: 214eed2fa4bb1400d8cde85ca033e88c730abee3 SHA-256: 0b26ad93a005b69ed0c004a6a4da0924ed5c19eb81b8ac2b990611021a7d6cf7
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant portion pointing to disposable domains and exhibiting link farm characteristics. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://dugedepap.ru/strik?utm_term=instep+bike+trailer+hitch PDF link annotation
    • http://doucheapp.xyz/change_battery_timex_watch_wr30m7sh7z.pdfIn PDF document text
    • http://teachersaid.fun/perbedaan_akuntansi_manajemen_dan_akuntansi_keuanganvuqy0.pdfIn PDF document text
    • http://tizadejaso.getenjoyment.net/ncc_c_paper.pdfIn PDF document text
    • http://cheapkeys.site/830318312812ashh.pdfIn PDF document text
    • http://astropsychology.site/the_shining_1980_cast_twinsyu2lo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453720/normal_5feed2b6da660.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387408/normal_5ffc4863cecc8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383136/normal_6007d0e1f1ddd.pdfIn PDF document text
    • http://ribuvesigofozeg.22web.org/salilekunanu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454435/normal_5fd78cc647dc4.pdfIn PDF document text
    • http://help-violation.com/34454887339lhjdd.pdfIn PDF document text
    • http://sodahub.pro/753228373267ekaq.pdfIn PDF document text
    • http://saxosoxajivovud.medianewsonline.com/82172213965.pdfIn PDF document text
    • http://arendaavto.taxi/how_to_light_a_coleman_furnacemedno.pdfIn PDF document text
    • http://copyrightsupporthelpcenter.com/68622541170h3t87.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498882/normal_5fe1be192ae35.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/68f4ba5a-82cd-4968-9253-e5d556ae481d/fish_philosophy_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e29776d2-287b-4c48-89a5-0611105d2d2e/animorphs_the_invasion_graphic_novel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c936d20-103f-4414-9d5e-1e3189daa0ee/how_to_reset_galaxy_s4_active_to_factory_settings.pdfIn PDF document text
    • http://xigonix.rf.gd/islamic_wazaif_books_in_urdu_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88b0e068-9a5c-49fd-9e22-cb1d9829d280/why_is_my_ge_refrigerator_freezer_not_freezing.pdfIn PDF document text
    • http://lufeneweb.epizy.com/padegigilem.pdfIn PDF document text
    • http://gixarewujedel.atwebpages.com/nibojo.pdfIn PDF document text
    • http://wixufoliwesomep.epizy.com/yantam_marathi_song_video.pdfIn PDF document text
    • http://tuminexozuvino.atwebpages.com/how_to_get_started_in_marine_biology.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_off00010274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10274 5160 bytes
SHA-256: be136ccb4343c7b91f820bcf858ebb6ea8d5189ca2ce1adc2957ec006a4995f9
font_01_sfnt_off000113f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F8 11280 bytes
SHA-256: 91367c714e474669973fd6e41f48f527bc7c39663042de0ec8c40134ecd27169

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