Malicious PDF — malware analysis report

Static analysis result for SHA-256 5887eac93fdfd59d…

MALICIOUS

PDF

69.2 KB Created: 2021-09-25 19:48:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 108101ffe4da8272dfbe7eb831e85389 SHA-1: c0f1ebb9a818464478f9f5aafec83494a3acc3bb SHA-256: 5887eac93fdfd59d4b805d79c61b481c021ae2396538f574374d64a03cbc7f76
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to external sites, many of which are associated with link farms and disposable hosting, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.
  • 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://inwebjor.ru/uplcv?utm_term=life+2017+full+movie+123movies
    • https://tootooair.com/FileData/ckfinder/files/20210906_FD3CC3FAFE8260B5.pdf
    • http://hydrem.ru/images/file/84044703587.pdf
    • https://graphicart.ro/fckfiles/file/11128483897.pdf
    • https://maydangson.com/vietkiendo/upload/file/nalakabuvevewixisekidu.pdf
    • https://bmw-zona.ru/uploads/file/45123784321.pdf
    • https://muguet.fr/sites/default/files/file/6636200187.pdf
    • http://canphantich.net/Images_upload/files/fegenagedabedizesamozikeb.pdf
    • http://www.icareonline.net.au/ckfinder/icare/files/buwevetojagotapolufotafaw.pdf
    • http://ebbers-schilderwerken.nl/uploads/files/supamomipujiro.pdf
    • http://digifast.cz/userfiles/litavupafexizifosotosowa.pdf
    • http://epwuae.com/userfiles/file/zowak.pdf
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/japunavusojibizobaki.pdf
    • http://parejalecaros.com/adjunto/upload/fck/files/zemafabugaturug.pdf
    • https://leonardscopysystems.com/home/leonards/public_html/ckfinder/userfiles/files/53349211024.pdf
    • http://drumlockingclamp.com/FCK_Editor_Images/files/pedorite.pdf
    • http://buydecor.ru/uploads/files/54642102749.pdf
    • http://uat2.hkha.com.hk/ckfinder/userfiles/files/domokubaguxidixulavukabar.pdf
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16147f6dd00ca3---57172182078.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613513f442784---51634624020.pdf
    • https://junona.manyel.website/images/uploads/medium/48152299943.pdf
    • http://pwmtqatar.net/userfiles/file/ximesutotamaponubewefamo.pdf
    • https://www.aledrukujemy.pl/ckfinder/userfiles/files/77241388838.pdf
    • http://allier.proximeo.com/ckfinder/userfiles/files/vuvavupetusumomevu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae7f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE7F 16792 bytes
font_01_sfnt_off0000c696.bin
b5430f0a90aafabdb057168376898cbbc08f2c3a1561c774b71fb5991728e8e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC696 10548 bytes
font_02_sfnt_off0000ded5.bin
c66490603bd6609d8abbe2a209f48a7dde5a5f0215a837be7641aaa935f0b634		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDED5 15644 bytes

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