Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eb2601344a87f53…

MALICIOUS

PDF

100.0 KB Created: 2021-04-30 09:03:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8578c382480edd37eb474749fc45fc94 SHA-1: b72d9b1a04343cc2c30e54a205dc74ac975c9824 SHA-256: 2eb2601344a87f531c79e99362fb7157839212f49380dfac068a2aec9a77d782
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, characteristic of a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as 'Pdf.Phishing.Trojan'. The embedded URLs likely serve as entry points to further stages of the attack, potentially leading to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=hundreds+chart+blank
    • https://pixabetamomu.weebly.com/uploads/1/3/1/0/131070001/nokubivorelezajiji.pdf
    • http://xomofaki.getenjoyment.net/78900979054.pdf
    • https://cdn.sqhk.co/valipovu/3gjwf07/t_mobile_lte_band_5_coverage_map.pdf
    • https://cdn.sqhk.co/feripamapuv/igx0jij/64169894862.pdf
    • http://sozapemogoz.mygamesonline.org/annotated_turing.pdf
    • https://wadewasugidaf.weebly.com/uploads/1/3/0/7/130775384/rigaxasepe_japusudime.pdf
    • https://padabomax.weebly.com/uploads/1/3/4/6/134681696/fukonew_renaviw_tagituzazudij.pdf
    • https://cdn.sqhk.co/purawewus/hgva10X/mcdonald_s_phone_number_cleveland_ohio.pdf
    • http://majusenise.sportsontheweb.net/academic_writing_book.pdf
    • http://rawoxaxevog.mygamesonline.org/how_long_does_it_take_for_an_atomic_clock_to_set.pdf
    • https://cdn.sqhk.co/bapuwanuvadi/PjiNggk/49623368005.pdf
    • https://cdn.sqhk.co/kugoxepif/hHGha4j/cooking_fever_restaurants_with_tv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rutufokedizon/61153776637.pdf
    • https://uploads.strikinglycdn.com/files/cbee1910-a6c8-4a24-b44b-f84103f1919e/nigewizajo.pdf
    • https://s3.amazonaws.com/sebunuzu/peduledosasam.pdf
    • https://uploads.strikinglycdn.com/files/57df26c8-5ed1-4083-a46c-f88cb6fea921/resmed_s9_humidifier_user_manual.pdf
    • https://uploads.strikinglycdn.com/files/95d81b32-d9ce-4da3-b622-d7459591fb11/fitted_face_mask_patterns_free.pdf
    • https://uploads.strikinglycdn.com/files/4e008470-794e-48e3-b2db-421cfe96cd3d/lorobeworuxuxaw.pdf
    • https://uploads.strikinglycdn.com/files/df4627f1-4ce7-440e-84c4-bb598d7e39a6/romeo_y_julieta_reserva_real_review.pdf
    • https://s3.amazonaws.com/fidobakipivogit/saitek_x52_pro_setup.pdf
    • https://uploads.strikinglycdn.com/files/70ae2851-9e15-4481-aee4-1ed5a5d06a3f/50338721327.pdf
    • http://nipelijikiki.onlinewebshop.net/kaufland_buduci_letak.pdf
    • https://s3.amazonaws.com/silubebebefuju/probability_problems_with_solutions_aptitude.pdf
    • https://uploads.strikinglycdn.com/files/06200898-2796-4f78-a31d-da2e77a39bed/94333983552.pdf
    • https://s3.amazonaws.com/bulikowexunepov/kenagugesoletasabebuk.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014481.bin
bf11afa4260df6b7661c355e8c448ef225fdf85fc1d71394a7b9aebebd35fd23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14481 5192 bytes
font_01_sfnt_off0001561c.bin
c7dc412124a4af07d3447b18daddbcffb572d3592f78eb3e49d945fc22ab4f77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1561C 13396 bytes

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