Malicious PDF — malware analysis report

Static analysis result for SHA-256 bacdf97f355ec361…

MALICIOUS

PDF

86.3 KB Created: 2021-09-13 02:12:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9dac2f6f1703ecc2956d92b2d78f64cc SHA-1: 42ecd0152927a5f96719c57b71e952806abfb8e8 SHA-256: bacdf97f355ec36109295e7b7eb38f4142102f9fa55a265ffbf42870ea1ecc6d
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and a link farm pointing to compromised WordPress upload directories suggests an attempt to distribute further malware or conduct phishing. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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 http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130981d27b9c---kotokozitiwagob.pdf In PDF document text
    • http://lg-palette.com/upload/files/gijojup.pdfIn PDF document text
    • http://toonesk.com/upload/99109361434.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/dejizaxetafuf.pdfIn PDF document text
    • http://integrotech.eu/zdjecia/file/11932769139.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/8e97a07f72f8be08a9e7937865c0d1c4/validejexewuwesut.pdfIn PDF document text
    • http://orderkiwicafe.com/uploads/files/mupibuserukusobesuf.pdfIn PDF document text
    • http://hoangminhsaigon.vn/@dmin/js/ckfinder/userfiles/files/77185878894.pdfIn PDF document text
    • http://rwdwebwebdesign.com/img-aim/files/79893234518.pdfIn PDF document text
    • http://africalegal.nl/userfiles/file/xonusewev.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1613535266d765---29735113677.pdfIn PDF document text
    • https://kitapkaplama.com/upload/ckfinder/files/64390697994.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/nuvave.pdfIn PDF document text
    • http://orthocarecentroortopedico.it/userfiles/files/jexojodosif.pdfIn PDF document text
    • https://cmottaviproductive.it/uploads/file/juxegalosajuje.pdfIn PDF document text
    • http://guowangcable.com/d/files/dakoxumajabonanepezunodo.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/xituwuzokalititavirug.pdfIn PDF document text
    • http://skpizzasubs.com/uploads/files/letofefatirituj.pdfIn PDF document text
    • https://cakenflowersonline.com/userfiles/file/somuzerixaroxagazikedo.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/73355fbd81ce6896f90a722ce7146f26/24787532844.pdfIn PDF document text
    • http://boston.pl/fck_pliki/file/xomawebabidinuxafelewep.pdfIn PDF document text
    • https://www.uflo.edu.ar/ckfinder/archivos/documentos/pokagemo.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/161336d9333c8c---jokiwuzi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=apna+sapna+money+money+full+movie+watch+online+123moviesPDF 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_off0000e8e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E9 18320 bytes
SHA-256: 84c66fe666d3306f71945ef2c16619c9c1b0bc89780d3b1609dea9c74749ff96
font_01_sfnt_off00011891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11891 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130A8 11336 bytes
SHA-256: c8990e61f06b113d1d218f1af817b08c1ce125ba04b9b7a457f732a25f7ab5e2

Open this report in the interactive analyzer, or submit your own file for analysis.