Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e9fc3c58b3fd7cd…

MALICIOUS

PDF

93.5 KB Created: 2021-09-19 23:05:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 652dc6d19c162458fde2644e0832720d SHA-1: bd7d8f28c2a9ac30e4435b057d2f997443e240ba SHA-256: 0e9fc3c58b3fd7cd8f84dd4acc261030c384863900d7a15dc88e9041f108b6c0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable hosting or compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://ventadeterrenosagricolas.com/userfiles/file/35185686797.pdf In PDF document text
    • https://mylin.in/ckeditor/ckfinder/userfiles/files/naduzakefuzawa.pdfIn PDF document text
    • http://grandinhr.eu/images/user/file/bepinutegow.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614050a3536ed---forefijazibodomaviwimeva.pdfIn PDF document text
    • https://happy-playground.gr/uploads/_uploads/files/saxisetepibogubub.pdfIn PDF document text
    • https://nepalipublisher.com/ckfinder/userfiles/files/66157526945.pdfIn PDF document text
    • https://ice-group.pl/userfiles/file/nojopuxoxosokazusu.pdfIn PDF document text
    • http://www.hkrns.org.hk/ckfinder/userfiles/files/27859414312.pdfIn PDF document text
    • http://cuborh.com/natelinhanew/js/ckfinder/userfiles/files/97802828740.pdfIn PDF document text
    • http://angelascanu.it/uploads/file/26439717589.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/vovebejanupokomofe.pdfIn PDF document text
    • http://kirche-treuen.de/UserFiles/File/mozero.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613d53006d928---zivimexejex.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16138a29515f7d---77888366833.pdfIn PDF document text
    • https://profm.hu/files/file/2263790298.pdfIn PDF document text
    • https://gfwofficial.com/ck_imgs/files/lelerovulazi.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135dce84a995---27214521577.pdfIn PDF document text
    • http://nfc-lampang.com/user_img/files/99032343089.pdfIn PDF document text
    • http://inphilong.com/upload/files/971075249.pdfIn PDF document text
    • https://ckfinder.pamlskovnik.cz/ckfinder/userfiles/files/lafupovugeliketo.pdfIn PDF document text
    • http://mawratanews.com/armedia/uploads/files/52907351226.pdfIn PDF document text
    • http://bygreenpure.com/userfiles/file/sebitijiwikinulopojeperop.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/f52c270812d5133266fccf29478cb06e/lupanavelatonobodu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=1234+free+moviesPDF link annotation
    • 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_off00010c08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001241f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1241F 10356 bytes
SHA-256: 42342c2351b97ed9c5c2a57d7dfa492a81341911d59708fb19ef34522bf62579
font_02_sfnt_off00013ba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BA5 17228 bytes
SHA-256: a6d9cc127f5a5b579f21c64fd51be44b6d1ef1133127936ec3bc3ed82b21f476

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