Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7d730d47f33f0b0…

MALICIOUS

PDF

84.6 KB Created: 2021-09-14 04:30:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 84d0f41da1b1d765b48e3613dfcd22f2 SHA-1: e7f98ec1536780077dc03dd584e95d9e9755c726 SHA-256: e7d730d47f33f0b003ad53e87dd93773e7c2239594faeabe6f9b83c2cfb07021
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to deliver a second-stage payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pixomot.ru/uplcv?utm_term=a+wrinkle+in+time+full+movie+tamil+dubbed PDF link annotation
    • http://xn----dtbsgbucafmmaf.xn--p1ai/servimages/editor/files/88537330184.pdfIn PDF document text
    • http://tinhdauvietnam.vn/upload/files/58404746171.pdfIn PDF document text
    • http://rockhouseschool.com/rockhouse/uploads/files/nolegituwut.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/b793ec9e61c6ba9364c1141a444968d3/62181629193.pdfIn PDF document text
    • https://tattica.byespresso.com/app/webroot/files/upload/files/99060915810.pdfIn PDF document text
    • http://heorungminhphat.com/luutru/files/negoxepezakabikumukivezin.pdfIn PDF document text
    • http://www.grupoaccs.net/ckfinder/userfiles/files/17628479922.pdfIn PDF document text
    • http://dungculamdep.com/fckeditor_userfiles/file/7421652577.pdfIn PDF document text
    • http://musclecar-taps.com/js/upload/files/45575352288.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/17066665107.pdfIn PDF document text
    • https://nabil-doukali.com/userfiles/file/zideg.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/xugol.pdfIn PDF document text
    • http://stagelight.pl/userfiles/files/34740160010.pdfIn PDF document text
    • http://vencedor.coop/images/admin/file/50610773019.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/tepom.pdfIn PDF document text
    • http://wami.cc/data/files/96607400794.pdfIn PDF document text
    • http://rivucota.com/upload/files/33892022515.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fc90036d6e---xafotosugamasanobipabo.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1cb9256e1---jufikupizulujusas.pdfIn PDF document text
    • http://resortvillairene.it/userfiles/files/61141875796.pdfIn PDF document text
    • http://ruizhishengwu.com/uploadfiles/file/061259541546.pdfIn PDF document text
    • http://home-hj.com/up_photo/file/dojawiwomarerugudi.pdfIn PDF document text
    • http://boonfagrandhome.com/user_img/files/1607677404.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_off0000e468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE468 10812 bytes
SHA-256: 7accffe5c70346f4e477e7744b255309c2ca48f61e893b51669da19c1e856724
font_01_sfnt_off0000fd5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5A 18160 bytes
SHA-256: 97ca08f91f97dc49bad0edefa3135a692bab47b02325b8c09d56d7f40c487f88
font_02_sfnt_off00012c3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1