Malicious PDF — malware analysis report

Static analysis result for SHA-256 e002df3715076fbe…

MALICIOUS

PDF

76.0 KB Created: 2021-09-23 10:57:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 8fe3fb3baaa6575eb28b92fcae149e7e SHA-1: b9d8a8f50f60f925289c01a8949bdfc437984a8a SHA-256: e002df3715076fbe39f152d62951d75b3633686e4c92b7c92edbff57db69ae4a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection to these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://www.sainteuphrasia.com/www/js/ckfinder/userfiles/files/71797010892.pdf In PDF document text
    • http://analogsys.com/uploaded/file/20411212076139ccc7b98d3.pdfIn PDF document text
    • http://fjzy18.com/image/uload/files/narenep.pdfIn PDF document text
    • https://www.disbel.es/ckfinder/userfiles/files/bezuj.pdfIn PDF document text
    • https://chambredhotes-savoie.com/ckfinder/userfiles/files/xuwiziwapizixuwivufiw.pdfIn PDF document text
    • http://glavis.biz/userfiles/file/pamofavunokutezexe.pdfIn PDF document text
    • http://redigonda.it/userfiles/files/54979496162.pdfIn PDF document text
    • https://vegastel.eu/components/com_mijoshop/opencart/image/data/files/56476534136.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/16139c7f0e3ed2---23918674201.pdfIn PDF document text
    • http://traiteurluc.com/userfiles/file/74169443901.pdfIn PDF document text
    • http://makinsushi.com/uploads/files/vediroso.pdfIn PDF document text
    • http://szymonadamczyk.pl/uploads/fck/file/71125407663.pdfIn PDF document text
    • http://duancanhotot.com/upload/files/25008285699.pdfIn PDF document text
    • http://bischofs-scheune.de/userfiles/file/noxaj.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/tu8r3upkhm0sj9buklb17roi71/17800109441.pdfIn PDF document text
    • https://ecoverservice.be/gallery/file/88187299794.pdfIn PDF document text
    • http://elite-nails.pl/Upload/file/6719891854.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc971b5db2---64001944121.pdfIn PDF document text
    • http://forumcutuca.com/ckfinder/userfiles/files/51964331682.pdfIn PDF document text
    • http://lawfirm.vn/MINH/user_files/file/fovage.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/433d9ad5177804d3736ccb65bd59e6bb/64124427455.pdfIn PDF document text
    • https://tanhoaphat.vn/userfiles/file/94957116732.pdfIn PDF document text
    • http://olympicthesportshop.in/uploads/70420493028.pdfIn PDF document text
    • http://fotofolliasanlazzaro.it/userfiles/files/bazibetopokoxitebo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=download+pikashow+apk+for+pcPDF 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_off0000c265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC265 18400 bytes
SHA-256: f994d29b1d8cdd624291290ef27205a5e59cd48b794dade7db15d6a064ccdd55
font_01_sfnt_off0000f1c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C2 10664 bytes
SHA-256: ecc2e249b4d57ae815b6b13223b40bdcb9b8c3deb1760f378ce7dc4f9cfa4137
font_02_sfnt_off00010a22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A22 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1