Malicious PDF — malware analysis report

Static analysis result for SHA-256 a621bd384c4e58fd…

MALICIOUS

PDF

73.3 KB Created: 2021-09-18 05:04:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ce227cd4719707562a96eb2be26420e1 SHA-1: 05758c3ea2d2ab4f8d78073491560a58d54e979b SHA-256: a621bd384c4e58fde454fdec28b6164f88eb83702f27874ba5394fc19789811b
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it functions as a link farm. It contains numerous embedded URLs pointing to various domains, suggesting an attempt to redirect users to potentially harmful content. The presence of external URIs and the overall structure strongly indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 5

  • 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.
  • 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://coretry.ru/uplcv?utm_term=gay+dating+apk PDF link annotation
    • http://kamkmori.cz/ckfinder/userfiles/files/runopixitamoso.pdfIn PDF document text
    • https://chennothinterios.com/uploads/file/norejipakemonak.pdfIn PDF document text
    • http://mjacz.cz/soubory/files/sunidosipigilek.pdfIn PDF document text
    • http://aaas.handyfriendship.com/upload/files/fesizejajobewujokex.pdfIn PDF document text
    • https://firmabudowlanawalczak.pl/web/uploads/files/7162198977.pdfIn PDF document text
    • http://mycoapaisyl.com/webimages/files/nurok.pdfIn PDF document text
    • http://siamsnail.com/media/userfiles/files/xelixuzozasigugiro.pdfIn PDF document text
    • https://epponline.com/mentorfinancial/page_images/file/22394247733.pdfIn PDF document text
    • https://sanipacific.com/attachment/file/70536348947.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/fakatugewovopefolujisul.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16144cafc78c7f---95527246275.pdfIn PDF document text
    • http://bluelakehomestay.com/uploads/image/files/20867759964.pdfIn PDF document text
    • http://tiszaikaland.hu/upload/file/ludaxo.pdfIn PDF document text
    • http://hutnia.pl/userfiles/file/80684021375.pdfIn PDF document text
    • https://worldcastlive.com/userfiles/file/golojovejuzet.pdfIn PDF document text
    • http://www.ags-sib.ru/ckfinder/userfiles/files/23381470152.pdfIn PDF document text
    • http://intertexmedical.com/userfiles/files/xuxigal.pdfIn PDF document text
    • http://lubrifianti-auto.ro/files/file/konitoraditufoz.pdfIn PDF document text
    • https://underworldgear.com/admin/images/fckImg/file/silixusidonokefevi.pdfIn PDF document text
    • https://ibliberia.com/ckfinder/userfiles/files/3611154621.pdfIn PDF document text
    • https://matratva.in/userfiles/file/pupiredijuditazilevikid.pdfIn PDF document text
    • http://kingsap.com/file_media/file_image/file/12133348654.pdfIn PDF document text
    • http://thelifelesson.net/home/tappingchanges/public_html/dowalumniusa/ckfinder/userfiles/files/34744735255.pdfIn PDF document text
    • https://grup-insaat.com/userfiles/file/17519112301.pdfIn PDF document text
    • https://dursunguney.com/userfiles/files/sutoge.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_off0000bce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCE6 16992 bytes
SHA-256: 83e000273d048054a54a32b84521fabb5243f1df776a00bfa0253d728e0fa12d
font_01_sfnt_off0000e918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE918 10248 bytes
SHA-256: 65f4ad965ddce2fde5beb45fc482f752f5b34232219b608ecd2ee0ab1a25357c
font_02_sfnt_off00010003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10003 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.