Malicious PDF — malware analysis report

Static analysis result for SHA-256 54e30353c19cadcd…

MALICIOUS

PDF

76.6 KB Created: 2021-09-23 01:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2c29ae914164541378c8447f6ef4665f SHA-1: 005f7498db23a556df469aa6af8549ac6e594ee4 SHA-256: 54e30353c19cadcd3c29e0d8abbc79c955be23adb651374f9fcead229ce1758c
132 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, which is often used to redirect users to malicious websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links to potentially disposable domains, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6300

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://carrozzeriabosini.net/userfiles/files/80135659859.pdf In PDF document text
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/32986475143.pdfIn PDF document text
    • http://hyunsin.net/userfiles/file/zitipemezumineguposa.pdfIn PDF document text
    • http://plusk-car.com/js/upload/files/badavirofet.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/16137cf9d6bf80---95343327403.pdfIn PDF document text
    • https://siltri.com/fck_upload/file/gotexopepenopazudaxete.pdfIn PDF document text
    • http://studio-rivetti.it/userfiles/files/bawobagupuzigukipidagode.pdfIn PDF document text
    • https://happy-playground.gr/uploads/_uploads/files/xudeluloxit.pdfIn PDF document text
    • https://ywint.com/ckfinder/userfiles/files/1631884811.pdfIn PDF document text
    • https://marblobath.com/app/webroot/img/files/vepona.pdfIn PDF document text
    • http://pkpneu.cz/userfiles/file/zasirepizivaxaluxegadeben.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/162257022422.pdfIn PDF document text
    • http://theffirm.com/userfiles/file/xixilaserovipeminulixikuf.pdfIn PDF document text
    • http://kennycojewelry.com/userfiles/files/202109/1630495316.pdfIn PDF document text
    • http://notariocprietoa.com/notaria/documentos/files/86947338946.pdfIn PDF document text
    • http://cuspsurgeons.com/userfiles/file/38709445216.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/29492811793.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613495d2d380a---23282858493.pdfIn PDF document text
    • https://www.agencesramos.com/ckfinder/userfiles/files/dojijewerupimenariba.pdfIn PDF document text
    • https://rimi.sk/userfiles/file/40872018577.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/gujesufinajogovuwo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=download+family+farm+seaside+mod+apkPDF link annotation
    • 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_off0000d1af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e9c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C6 10856 bytes
SHA-256: 18fb410da0421b40ff45be64f07645ce6fcb6ed4345ff41c4996f841494e6c2c
font_02_sfnt_off000102d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D0 19080 bytes
SHA-256: 5991c500450cef62c25716e40ee24c967265b6135fc2a12ecc88ee7dfaff0973

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