Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba64f07e0ee7810e…

MALICIOUS

PDF

82.1 KB Created: 2021-09-20 21:43:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2696beae6bdfece25e0e6d0ea2efb7d1 SHA-1: 49fb2dca4636bfe7675bfc7b77981ff7fc5a8f3c SHA-256: ba64f07e0ee7810e60451801b6295623472136640af51f9c2f877aa6aa32b94e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect the user to malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript points to its use as a delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://krisoc.ru/uplcv?utm_term=free+fire+ki+video+banane+wala+app PDF link annotation
    • http://jumpstart.mobi/ckfinder/userfiles/files/19733256081.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/u5r1s9905utsbntr73tg43k0g1/kutibimagevixomomarebu.pdfIn PDF document text
    • http://pobierzplik.pl/uploads/files/46744459421.pdfIn PDF document text
    • https://szabobuszrendeles.hu/files/files/12272065216.pdfIn PDF document text
    • http://trust-law-firm.com/userfiles/file/20210916035344_1122507453.pdfIn PDF document text
    • http://encino.ilovepokebar.com/uploads/files/6776302702.pdfIn PDF document text
    • http://k3projekt.pl/uploads/userfiles/files/megefafotawuzo.pdfIn PDF document text
    • http://centonze-vini.com/userfiles/files/87321523949.pdfIn PDF document text
    • https://servauto.fr/img/user/file/28559002120.pdfIn PDF document text
    • http://nsfeed.com/_UploadFile/Images/file/powuterafukerikadipiwaz.pdfIn PDF document text
    • https://tonmathunglan.vn/upload/files/xeneropurigenef.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/78429335927.pdfIn PDF document text
    • https://tunhuaduytan.com/upload/userfiles/files/vaxetavavoredaroxadi.pdfIn PDF document text
    • http://fertilityupdates.com/userfiles/files/72916802799.pdfIn PDF document text
    • http://nagakuratrading.com/js/upload/files/64141823175.pdfIn PDF document text
    • https://bahceneryaman.net/public/content-images/files/53072599552.pdfIn PDF document text
    • http://saigondome.com/uploads/userfiles/file/87965758734.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.net/ckfinder/userfiles/files/70491801952.pdfIn PDF document text
    • https://apaman.ti-am.jp/js/ckfinder/userfiles/files/bewejunewutunukimaf.pdfIn PDF document text
    • http://e-junghan.com/userData/board/file/ruwajetajiba.pdfIn PDF document text
    • https://verredistri.fr/xmedia/file/kemabedo.pdfIn PDF document text
    • https://cemb.ca/upload/editor/file/dorabomigi.pdfIn PDF document text
    • https://maria-galland.ru/files/file/fulonagufolisuguvigetaxix.pdfIn PDF document text
    • http://konditsionery-odincovo.ru/upload_picture/file/butojusevoxijiximelojun.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC11 17860 bytes
SHA-256: c5a6fb6072f0c1dea4c23cb9c32a8dbc957d831de5edbb82663adf75f990c3ef
font_01_sfnt_off00010a88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A88 10584 bytes
SHA-256: 5e8b1a14f7cd4932fd56a7a3d4a51e178ade899c15005344ca89942d86bfd5f0
font_02_sfnt_off0001228f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1228F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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