Malicious PDF — malware analysis report

Static analysis result for SHA-256 262df06037fe59d0…

MALICIOUS

PDF

80.1 KB Created: 2021-09-15 17:55:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5e7f2594c01068bb1ebcbe2735257662 SHA-1: 27da1ccfdb9b4d93f732e5d5c69f6173ab781adb SHA-256: 262df06037fe59d0a5a174a2d589f3fa3f1e9f70d2eb05a31a6708741ed40dec
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the structure and URL patterns are indicative of a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 6

  • 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.
  • 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://tlumacz-bialystok.pl/pliki/file/jekuvedevejodas.pdf In PDF document text
    • http://sameiroeventos.pt/ficheiros/sowepapugagadimegutub.pdfIn PDF document text
    • http://abwingssuffolk2.com/uploads/files/1596115945.pdfIn PDF document text
    • http://serbanindustrialconstruct.ro/uploads/files/23572779408.pdfIn PDF document text
    • http://winhazel.com/indigo/ckfinder/userfiles/files/17119517689.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210911135508329052137.pdfIn PDF document text
    • http://thueotodn.com/uploads/image/files/27070455409.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/sjj8oslu5he7013i8n2b9p3pn9/47522861234.pdfIn PDF document text
    • http://playoz.com/ckfinder/userfiles/files/monifus.pdfIn PDF document text
    • http://xszhuhai.com/uploadfiles/files/49317499404.pdfIn PDF document text
    • http://e-store-sys.com/userfiles/file/reraxesewel.pdfIn PDF document text
    • http://centrlita.ru/archive/image/file/jazurigoloti.pdfIn PDF document text
    • https://alixdemassy.fr/userfiles/file/regojaje.pdfIn PDF document text
    • http://chinajessie.com/seadata/data/uploads/img/file/163087423020.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/d0771d0c7a51634d802491b14b7c727f/bewekebagefa.pdfIn PDF document text
    • http://weorderfood.com/uploads/files/39211588368.pdfIn PDF document text
    • http://energywork.pl/userfiles/file/38749173834.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613aa21b5ea79---fokixowebuj.pdfIn PDF document text
    • https://maggies-handmade.com/UserFiles/files/10019647062.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/66866869981.pdfIn PDF document text
    • http://snabsz.ru/ckfinder/userfiles/files/40512099864.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/d1717e350b04ef21fdf4c317e4bce2ff/fokelofomafepugolomaz.pdfIn PDF document text
    • http://papienbanana.com/user_file/file/87242303202.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/87792588739.pdfIn PDF document text
    • http://phanphoiongnhuahoasen.vn/upload/files/bigose.pdfIn PDF document text
    • http://sun-eko.eu/files/file/33004393230.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/bofugizi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=metal+gear+solid+psp+romPDF 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_off0000d2c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ead2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD2 18420 bytes
SHA-256: 1b32aa73744653aae90350dd3d36e2875e936d805a5e97d6e1c399e6c58485fc
font_02_sfnt_off00011ae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE8 10624 bytes
SHA-256: d3d579cc46def9b16d4ff25debc2ad28ac17bc91a4e746ecb41a17a3477a8d61

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