Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e7307dcda9ec075…

MALICIOUS

PDF

79.4 KB Created: 2021-09-19 05:34:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 407d63eadb6eb5ab8217652330a351e5 SHA-1: b966080c709f26078386809f4aafad21390e37ec SHA-256: 0e7307dcda9ec0756a84b5d61e64d74254b33c6017d4b34b7b1dfeed996b7281
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external URIs, with several heuristics indicating it functions as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing or malware-hosting sites. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • 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.
  • 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 http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/16140a314db09a---80379970915.pdf In PDF document text
    • http://xn--djr00fsyfv0o5qgy9u.com/filespath/files/20210914060328.pdfIn PDF document text
    • https://sandp-engineering.com/ckfinder/userfiles/files/70361679750.pdfIn PDF document text
    • https://reaga.net/js/ckfinder/userfiles/files/38236644267.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/fovejupumumu.pdfIn PDF document text
    • https://www.blondel-bois.fr/ckfinder/userfiles/files/34779319792.pdfIn PDF document text
    • http://paolacaone.eu/userfiles/files/sevil.pdfIn PDF document text
    • http://toonesk.com/upload/66132250330.pdfIn PDF document text
    • https://dehaventransportation.com/home/de/public_html/ckfinder/userfiles/files/60348842305.pdfIn PDF document text
    • http://4chan.ro/UserFiles/file/xasuveg.pdfIn PDF document text
    • http://heninrealty.com/userfiles/files/48182421321.pdfIn PDF document text
    • http://sbsinternationalschool.org/userfiles/file/gosiko.pdfIn PDF document text
    • https://tennis-samara.ru/img/file/pajaxaburalaruk.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/zafapogusijupuweruguros.pdfIn PDF document text
    • http://cctsw.net/whly/up_files/FCK/file/20210907_001751_137.pdfIn PDF document text
    • https://camphacement.vn/upload/files/zowokafopomiju.pdfIn PDF document text
    • http://dolphinkorea.com/files/files/pivegumasolidemutixutuw.pdfIn PDF document text
    • http://co-wemart.com/careeruserfiles/file/puxiferekuwonipizo.pdfIn PDF document text
    • https://aucordechasse.fr/vosImages/80685808992.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/62017430167.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/19607296181.pdfPDF link annotation
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/ddhr0ahn1htol1284hf5u6gcj1/fijuluk.pdfIn PDF document text
    • https://www.comperat-89.fr/ckfinder/userfiles/files/nopuvosokavul.pdfIn PDF document text
    • http://vagtteam.com/userfiles/Files/fofebidules.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=jailbreak+redeem+codes+2021PDF 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_off0000d10a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD10A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e91c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91C 17804 bytes
SHA-256: 56529ec9386f4c77d207e8e7b3c9c0d577ef720e3d8898a86e2a12119d00eea7
font_02_sfnt_off00011726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11726 10848 bytes
SHA-256: 9e0325242e74c85830b22abc90b0045fd73a50925ab3b9ce51a19bd4168440cf