Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeeaabe527f9aa14…

MALICIOUS

PDF

102.9 KB Created: 2021-07-14 02:56:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 27ed6965d082756f835ff92e697b1c6c SHA-1: 5b2ab8fe70db823492793a5982e5c7e4dfcd2a8b SHA-256: eeeaabe527f9aa14cd91397241ac3f1ddd6b2be351cd6fe094cd2f7f30bc721b
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and multiple external URIs, with several heuristics indicating a link farm pointing to compromised WordPress sites and even a raw IP address. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or to serve a second-stage payload. The embedded JavaScript is a common method for exploiting PDF vulnerabilities or redirecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://wastran.ru/uplcv?utm_term=dnd+5e+icewind+dale+rime+of+the+frostmaiden+pdf PDF link annotation
    • http://127.0.0.1/bantraicay/js/ckfinder/userfiles/files/poluwozides.pdfPDF link annotation
    • http://clarasonic.com/upload/file/ririzezewixo.pdfIn PDF document text
    • http://matras-devison.com/upload/file/jolilopetosazuzufivapena.pdfIn PDF document text
    • http://nfraccon.org/userfiles/file/datodusamevalukemuto.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/1vufld1g02v3q3hse3147245o3/90673965823.pdfIn PDF document text
    • https://bgmediation-flm.com/userfiles/file/30135532323.pdfIn PDF document text
    • https://asi-filter.pl/files/file/buluk.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/212759db2da45e38fddaa729e9446123/mabuvabobopekujejorob.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/qailntl519qhtmmd8fm06adv5t/6848156308.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/30174527393.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/e1aa0b6bd14d4349e26ba5a276ceae2a/42823699076.pdfIn PDF document text
    • https://gazelletr.com/userfiles/files/90262891129.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b148a94dfc1---delogovadujige.pdfIn PDF document text
    • https://tcremich.lu/files/files/wedox.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/kapotinefunirigofon.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/d43d64e8e226b4f7734c0faacaf59539/47032139624.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099b461bedb2---11552028529.pdfIn PDF document text
    • http://w3-japan.com/js/upload/files/gepanov.pdfIn PDF document text
    • http://itnetworkconsultingsf.com/helpdesk/app/webroot/img/userfiles/files/lufuzulilenifofol.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/d0bd79787fcb2685ceee3f5c00370119/fakelelu.pdfIn PDF document text
    • https://condicionamentofisico.com/arquivos/file/94732360901.pdfIn PDF document text
    • https://landi-bg.com/images/file/minugorotesilubi.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/76556339703.pdfIn PDF document text
    • http://sushiosushi.com/uploads/files/46305929213.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_off00012e67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E67 11108 bytes
SHA-256: 270aa97a2d97eacd221af97af5f16e0bbe658cce5320ca7f1a1808b2f44b41f4
font_01_sfnt_off00014831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14831 17532 bytes
SHA-256: 8f86ea7076fd183114dde1dc06a6b1bf99f9e4360353ffb6749ac86735a450c5
font_02_sfnt_off000175ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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