Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1f3254bb9427828…

MALICIOUS

PDF

88.1 KB Created: 2021-08-08 21:11:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 3dd54b95c9d68bf2001c580c1fd81f86 SHA-1: b6181b5dbdd164db31147546e0d1b5c47735d1ad SHA-256: e1f3254bb9427828bf18596da38212eeee7e77410b572660a8efae582af68bf6
272 Risk Score

Malware Insights

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

This PDF contains embedded JavaScript and multiple URLs, indicating it is designed to exploit vulnerabilities or trick users into downloading malicious content. The critical heuristics 'SE_SECRET_RECOVERY_LURE' and 'SE_PASSWORD_ARCHIVE_LURE' strongly suggest a phishing or credential harvesting attempt. The embedded JavaScript likely facilitates the download and execution of a second-stage payload from one of the provided URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 10

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cructi.ru/uplcv?utm_term=rar+password+recovery+crack+online PDF link annotation
    • http://nutricion-intravenosa.com/wp-content/plugins/super-forms/uploads/php/files/c2ab8acd5d4bb899141820d8261b4501/difilobetuseb.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbf5edd5bb---12780482419.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/b3d549ac939afdbe179fda83bdcfcc41/kijelaninefijixilopodesav.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/nar64dh47b3o59ioviabcb5h9r/jelakadenasegodat.pdfIn PDF document text
    • http://phuwangnam.com/user_file/file/likusifegukeruliboge.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021080616441258.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b42390a0eb2---sawomajidabupelavu.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/963763e0be275e6f81403745441f5a70/novepelepegidibunuxav.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095816daeff6---fegolirukixajitizuwome.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/30a3a67e9a12b5aa081da2c0f7c50423/3594967051.pdfIn PDF document text
    • https://fenixfalt.com/userfiles/file/xizunagux.pdfIn PDF document text
    • http://dakhoanhanai.com/images/files/tidofamoj.pdfIn PDF document text
    • https://hainutedecopii.eu/ckfinder/userfiles/files/xawit.pdfIn PDF document text
    • http://chrislahoda.ca/userfiles/file/zikitogaze.pdfIn PDF document text
    • http://zulassung4you.de/bilder/file/xuvidetusalemi.pdfIn PDF document text
    • https://mednet.mk/public_html/upload/userfiles/file/20047163816.pdfIn PDF document text
    • http://nhuaduongnhapkhauaz.org/upload/files/77714540309.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/kdo0i77qbr4cddev6n42nrkqvs/70033256718.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/kedadedenerakadi.pdfIn PDF document text
    • https://kungfuclasshongkong.com/louis/taichi/ckfinder/userfiles/files/53826956533.pdfIn PDF document text
    • http://santiagoporter.com/js/ckfinder/core/connector/php/files/rawosejuju.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a1caddc9bde---27068409066.pdfIn PDF document text
    • http://edu-tur.ru/userfiles/file/gosimadizadejogujodowu.pdfIn PDF document text
    • https://patc.fr/imagesfile/8453697300.pdfIn PDF document text
    • http://sdes.in/uploads/22900089449.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_off0000f262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF262 10812 bytes
SHA-256: b86f778548e9724a372aca5625d690f04abf1faf7d2ee6336c2ae3d2069597e2
font_01_sfnt_off00010b7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7B 17204 bytes
SHA-256: 50230b9ff3af274b43c73b522db1830efece8b58d763fe6b92612fb9432b627b
font_02_sfnt_off00013876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13876 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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