Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b6737027c583655…

MALICIOUS

PDF

144.6 KB Created: 2021-05-22 18:13:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: ff33032d5bfd2345af28878fc373eab9 SHA-1: da049328e120cad02d018c284fe949d8e12a41ec SHA-256: 5b6737027c5836557c42f15c0805a7b1fdefa9ee8b7308d90af6830aa9d73449
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are structured to appear as search results for popular movie downloads. The primary malicious URL identified, https://leonvi.ru/strik, is likely part of a link farm or phishing operation. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/strik?utm_term=munna+bhai+mbbs+full+movie+hd+download+filmywap PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379049/normal_5fd63aa391a99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480155/normal_603fd92a21862.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415739/normal_5fe7954a6c171.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380073/normal_5fd61899025d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413697/normal_5ff033cf3d59d.pdfIn PDF document text
    • https://vizefibamoraxob.weebly.com/uploads/1/3/4/6/134613498/gunubuw-tinarujonefa-vomajixigefiw-wogojezaw.pdfIn PDF document text
    • https://pixirexujana.weebly.com/uploads/1/3/4/5/134527097/pokosakivaseka_suxojodoweja_rudafosagopudeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460946/normal_604889f09acbd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387919/normal_5ffd2881895bb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/xabalaru/butyl_ethanoate_formation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb684c97-29cb-477f-8b13-f3a2944ef596/sap_wm_stock_transfer_tcode.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/turnigy_9xr_pro_simulator_usb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd169e6f-72f7-4154-8919-6bb2bf1e1405/the_four_movie_download_in_hindi_dubbed_480p.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/word_count_excel_spreadsheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b33188ea-3287-497e-a903-6223e3834c91/what_does_the_maintenance_required_light_mean_on_a_honda_accord.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/xewetunafaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a908dbe-76d7-4ed9-9002-3f7467987470/the_hunger_games_catching_fire_movie_download_in_isaimini.pdfIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/who_sells_ducane_hvac_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/winner_telugu_1080p_video_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48cbc432-185c-4dbe-aeda-1fb9980d700c/merchant_of_venice_full_book.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a5f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A5F5 5584 bytes
SHA-256: 362a9be790004bd1985f421ea5359b6800ecdd31bbd0fd8497a74b05e3ea2dd4
font_01_sfnt_off0001b8f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B8F1 3720 bytes
SHA-256: a7c194c348f4bc26aad06ae1fa1eadf76503a3aca856ff80314c3d87a816eea9
font_02_sfnt_off0001c44e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C44E 2912 bytes
SHA-256: b439981cda7edf932864c2bac572ace6c1fa7c6ca4afcb9ba51f9fa944257704
font_03_sfnt_off0001d086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D086 12160 bytes
SHA-256: 9698b757a765dbe5c232fe1883e7306a627f8f08a9dacd037c7b5e9d877824f0
font_04_sfnt_off0001fa4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FA4A 16384 bytes
SHA-256: 27d5aa48a66ed6e24074f1b6b97defbd08161f468927a62883f94c9ec160026f
font_05_sfnt_off00021050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21050 11088 bytes
SHA-256: fa0f16204cfafe914577601f30fff8e81dca1627794fdbea986f7840a3e07dab