Malicious PDF — malware analysis report

Static analysis result for SHA-256 0148dc219faf8caf…

MALICIOUS

PDF

65.1 KB Created: 2021-09-29 01:44:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6904cd8262475d7b9bb80ea2e30efab2 SHA-1: 527309b7fed695d79d0c868c7c12560466772e6a SHA-256: 0148dc219faf8caf780c9bee4a889b6730d203b6686cd6f967bb0cd2e727035d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external URIs and is flagged as a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. The embedded JavaScript stream suggests potential malicious scripting capabilities, likely used to redirect users to these external sites. The ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4442

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.
  • 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
  • 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://philabc.ru/uplcv?utm_term=the+first+and+last+freedom+krishnamurti+pdf PDF link annotation
    • http://hostingureitings.lv/uploads/userfiles/files/48988266707.pdfIn PDF document text
    • http://drironcat.com/images/file/naronisujudovo.pdfIn PDF document text
    • http://sklenicky-obchod.cz/web/admin/fckeditor/userfiles/file/kefizanufagiwisuratadel.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/14389016006.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210906_085955.pdfIn PDF document text
    • http://ulleungroadtour.com/FileData/ckfinder/files/20210921_25BF3068DD49BF0B.pdfIn PDF document text
    • https://groupekineconcept.com/userfiles/file/jataviwoluv.pdfIn PDF document text
    • http://ladyqueen.it/userfiles/files/13068688543.pdfIn PDF document text
    • http://ppfi-online.com/userfiles/file/13588140767.pdfIn PDF document text
    • https://leo.tw/upload/ckeditor/files/rusajumita.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/66898581493.pdfIn PDF document text
    • http://imobilestore.de/userfiles/file/60557563393.pdfIn PDF document text
    • http://www.cemeba.com/uploads/ckfinder/files/24153205714.pdfIn PDF document text
    • http://icareonline.net.au/ckfinder/icare/files/gevomukixovog.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/659d90392cf1d8c768111186cc576997/rejatowamudarozeloseva.pdfIn PDF document text
    • https://alyosserspneed.com/userfiles/files/23743695733.pdfIn PDF document text
    • http://gaongonmaiphuong.vn/webroot/img/files/rivered.pdfIn PDF document text
    • http://pitin-akutsu.com/js/upload/files/3312513248.pdfIn PDF document text
    • http://erh-hu.com/userfiles/file/ruboxatolela.pdfIn PDF document text
    • http://classiccar-jp.com/js/upload/files/zufawoziguwopajoviviluk.pdfIn PDF document text
    • https://intersensor.ro/v2011/Files/fck_upload/file/29201009131.pdfIn PDF document text
    • http://tid.vn/upload/files/pedifutivil.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140feda9e624---kanedepefojesagip.pdfIn PDF document text
    • http://jtylek.pl/Upload/file/zisabojovimuwawadu.pdfIn PDF document text
    • https://eletroluz-al.com/_IMG/img_internas/file/43087562214.pdfIn PDF document text
    • http://greatwalledmond.com/ckfinder/userfiles/files/17656924732.pdfIn PDF document text
    • http://npas.ru/pic/file/40753289662.pdfIn PDF document text
    • https://kralpin.com/calisma2/files/uploads/65049492609.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b2ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2CA 10916 bytes
SHA-256: 5bc8914c722f57ae0fbe6b758a404bed993fdfe4caf0f94705ce73e1bcf2518a
font_01_sfnt_off0000cbe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE3 15244 bytes
SHA-256: f87d6ebb650bee044c50beea6baa72694dcf7ef13c0db46825f999db3fd6d6c3

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