Malicious PDF — malware analysis report

Static analysis result for SHA-256 85578e5461c39a29…

MALICIOUS

PDF

100.4 KB Created: 2021-04-08 04:43:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95c7c9e788afc89da16e25f9b8df3a9e SHA-1: dc656c86a9b26f8a4da906b2f577475dca6aae4b SHA-256: 85578e5461c39a29810df6349d92b2beb3d837db49fe5730d04a02dc0a8a3afa
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains multiple embedded URLs, with the primary one being 'https://jacksth.ru/wix?keyword=perpetual+motion+toys+youtube', suggesting a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of common phishing techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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://jacksth.ru/wix?keyword=perpetual+motion+toys+youtube
    • https://libesomed.weebly.com/uploads/1/3/4/9/134904451/tuxul.pdf
    • http://dusibarupuguli.medianewsonline.com/vavisexiretazopuduw.pdf
    • http://lifegirls.site/xijubasorhfsj3.pdf
    • http://axecheat6.xyz/22644449289jy1qw.pdf
    • https://cdn-cms.f-static.net/uploads/4462986/normal_605f5fcddea53.pdf
    • http://ca-management.website/domafodufagf2myk.pdf
    • https://static.s123-cdn-static.com/uploads/4411932/normal_6004607eb834a.pdf
    • https://nelibijejukeli.weebly.com/uploads/1/3/1/4/131437261/foludofolopadav.pdf
    • http://sosogemizibu.mypressonline.com/neoplasia_intraepitelial_cervical_grado_1.pdf
    • https://wunawewob.weebly.com/uploads/1/3/0/7/130775592/6c77b9c10877d15.pdf
    • http://zaxiluxedexu.getenjoyment.net/41810047930.pdf
    • http://ru-payment.casa/web_services_api_testingm91w2.pdf
    • http://bomisedoxu.mywebcommunity.org/developing_tactics_for_listening_student_book_tapescript.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://muburenimigalu.epizy.com/national_interest_of_pakistan.pdf
    • https://uploads.strikinglycdn.com/files/ec421f07-0988-4209-9403-332541e90f7c/jisade.pdf
    • http://zaximibirada.epizy.com/23967390459.pdf
    • https://uploads.strikinglycdn.com/files/f83c282c-0f6d-4c67-a9d4-1a12573c5005/42965076477.pdf
    • http://pogifovemujure.epizy.com/71192049093.pdf
    • https://uploads.strikinglycdn.com/files/da8bebaa-84cb-4a80-b397-1da11eeadcd7/91860953609.pdf
    • https://uploads.strikinglycdn.com/files/7ddbd537-3b98-4134-b0e6-10997ca373c3/dimalato_de_magnesio_beneficios.pdf
    • https://uploads.strikinglycdn.com/files/e2d0e3c0-925f-40e3-8e30-04314cff274d/scarlett_18i8_3rd_gen_ipad.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_off00014b91.bin
2a8895fdf4c53ec857377f01a58dc7bbb4f7468d8a3a1a0de433cd19707a8eea
pdf-font-stream PDF embedded font (sfnt) at offset 0x14B91 5208 bytes
font_01_sfnt_off00015d30.bin
8f5457c28cdd9d9d7241600937e7161cf6a94c113968f76783cbc47d9bb3c048
pdf-font-stream PDF embedded font (sfnt) at offset 0x15D30 11576 bytes