Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d478b8f19efab5f…

MALICIOUS

PDF

82.9 KB Created: 2021-04-16 14:17:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4289b7c1091307e4df4407eaeeadd2c7 SHA-1: 551c82e7e42209ee298a9e1b6a9f75e7e0fa6381 SHA-256: 5d478b8f19efab5f5878eefb63a56c9c7bf18e56965c6dcd8dedc3c285959f8f
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that, when clicked, leads to a phishing site disguised as an advertisement for a Dewalt drill battery charger. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into visiting the malicious URL. No scripts were extracted, but the PDF structure and embedded URI are sufficient indicators of a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/strik?utm_term=dewalt+drill+battery+charger+18v
    • https://cdn-cms.f-static.net/uploads/4391907/normal_6060089286eff.pdf
    • http://labiluwewinedu.22web.org/alberta_immunization_schedule.pdf
    • http://muzoc.xyz/flower_of_life_tattoo_meaningvmbxd.pdf
    • https://cdn-cms.f-static.net/uploads/4474465/normal_6012909085349.pdf
    • https://static.s123-cdn-static.com/uploads/4386081/normal_5ffc10dd337d1.pdf
    • https://static.s123-cdn-static.com/uploads/4421049/normal_6001080594819.pdf
    • http://itactical.xyz/xujosolw1se.pdf
    • http://healthbeauty24.online/63234987122ow0vb.pdf
    • http://copalofa.site/90s_video_games_play_onlineulc5j.pdf
    • https://cdn-cms.f-static.net/uploads/4447646/normal_606cca830f1eb.pdf
    • https://cdn-cms.f-static.net/uploads/4479902/normal_604458f4d9ae0.pdf
    • https://cdn-cms.f-static.net/uploads/4489976/normal_6041d312b6cbd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://964beff5-d24f-450a-94e2-fa7e9faef44a.filesusr.com/ugd/61158f_666edb6e567f4ecbb1191216aa41d85e.pdf?index=true
    • https://0a37a3d5-a0bf-4e77-8ff5-6127fd08aefa.filesusr.com/ugd/6046c9_4485df3c376846119ada6627532c32b0.pdf?index=true
    • https://uploads.strikinglycdn.com/files/31efb395-524e-4580-81fb-bd7ff9eef291/what_is_a_called_in_math.pdf
    • https://uploads.strikinglycdn.com/files/68a44847-c0e2-42af-9c5d-b7f274258970/47044871259.pdf
    • https://4d75d3c9-3a4d-4df6-84ab-e48b83d723e5.filesusr.com/ugd/cdb50c_d0114cf2620946bebaa867675bbe1d84.pdf?index=true
    • http://baguzakanaso.epizy.com/82271557040.pdf
    • http://bagegamejejupu.epizy.com/72013667923.pdf
    • https://uploads.strikinglycdn.com/files/7245a126-61db-4858-951f-ba9be60ea742/quantum_field_theory_and_the_standard_model_problem_solutions.pdf
    • https://5c90cfa9-af55-48e2-9430-1f3580382729.filesusr.com/ugd/e2b09b_b65f679eb74648c5baeb26a225717633.pdf?index=true
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efa8.bin
5be0ec957b0e2e4e19f442381e359eb0c9a494b77f71c941a8004f4cef468eb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA8 5660 bytes
font_01_sfnt_off00010309.bin
4485b0700420df9239cd2a222ec2f2833287834e682e88798a9ca9ccf5ffbf37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10309 10860 bytes
font_02_sfnt_off00012855.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12855 16204 bytes

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