Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed5a3df01dbc9e76…

MALICIOUS

PDF

91.0 KB Created: 2021-09-06 01:56:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e3d8cf8a84ee356c656ad35099469548 SHA-1: e16dbc7362bf387b453c35a17f5959f7ce886c61 SHA-256: ed5a3df01dbc9e760475be37541c20085dbb6e3a995739cf44a4f59170b9a62b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which are hosted on disposable domains or compromised CMS uploads, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://pixomot.ru/uplcv?utm_term=scenic+design+and+stage+lighting+pdf PDF link annotation
    • http://hglobaltour.com/FileData/ckfinder/files/20210902_ABF0A4A94E6AC593.pdfIn PDF document text
    • http://vanphongphamhienluong.com/upload/files/dumebiwiz.pdfIn PDF document text
    • http://irollee.com/userfiles/file/xeguzuzefiruzediloduw.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/80366710553.pdfIn PDF document text
    • http://logo4you.dk/userfiles/file/77955077782.pdfIn PDF document text
    • http://humanlitech.com/files/files/rekejojajagoni.pdfIn PDF document text
    • https://mimpishio1bet.com/contents//files/41717421783.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/d3jhod6m9d61muqaqjnlo4cc7h/jujulelapamemim.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/419909433.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160aa90e20a677---zekerekidurimimuze.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160afb11c8c67f---53869667247.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/59924c694e02300746c6689ff3c65bc8/45551148865.pdfIn PDF document text
    • https://mahae.hu/files/files/rawefexitim.pdfIn PDF document text
    • http://www.truca-taoules.com//ckfinder/userfiles/files/bibatej.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102b0d7e93a3---83682583139.pdfIn PDF document text
    • http://affordableadobe.com/ckfinder/userfiles/files/72903120668.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/4ec1c645a3f2864c6ec17281a5830609/9498026704.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bdad849ed5b---71996257404.pdfIn PDF document text
    • https://mk-sito.it/uploads/file/80972766341.pdfIn PDF document text
    • http://taketty.xyz/js/ckfinder/userfiles/files/fekoravukesote.pdfIn PDF document text
    • http://matsusushionline.com/uploads/files/tekovem.pdfIn PDF document text
    • https://ytdrive.com/CKEdit/upload/files/jagubefaviwivubojukoxa.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_off0000fc15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC15 18956 bytes
SHA-256: 1fd8df25e20f34a10ba7310e0fad1f7015f69a82666bb9d9895c853ed2fafcbd
font_01_sfnt_off00012dad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DAD 10756 bytes
SHA-256: c70ab63f6e71d1d711ca3d3b38974b0eb4e836fa25f2bb6f718d9aee36e6cb5b
font_02_sfnt_off00014621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14621 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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