Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f0d9e16feeb0956…

MALICIOUS

PDF

82.3 KB Created: 2021-09-14 04:12:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0f8bcd1e67070ea068db9bd473a82760 SHA-1: 1307e7fe044a9ab70065872d81d883073ac922d6 SHA-256: 2f0d9e16feeb0956e9702c3fac520129244fb923965611b6051c62f5cdfdb2c7
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://smwebtechnology.com/arishayurveda.com/userfiles/file/bewot.pdf In PDF document text
    • https://heureka-cz.eu/files/58587922943.pdfIn PDF document text
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/48784590238.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c7204b9784---venimapadijubufam.pdfIn PDF document text
    • http://sperrincaravans.com/images/file/degipuba.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/tineve.pdfIn PDF document text
    • http://platypusspot.org/uploads/ckfinder/userfiles/files/wejup.pdfIn PDF document text
    • http://aweibel.com/Photo/file/39620352662.pdfIn PDF document text
    • https://rallstarawards.us/nbloom/fckuploads/file/tizafavobanowodexixegoj.pdfIn PDF document text
    • http://vncanada.vn/uploads/files/vonukujivu.pdfIn PDF document text
    • http://373113.linker.tw/files/fofilule.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/9e65568cde9843ad8d52bb20ab734b82/muvaza.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613fdb163ee57---3652640586.pdfIn PDF document text
    • http://chineseclothingonline.net/File/woninewasafizelejanifofo.pdfIn PDF document text
    • http://wixoon.hu/upload/file/duzuteba.pdfIn PDF document text
    • http://xn----otbbfbbknchz.xn--p1ai/sadm_files/moxosak.pdfIn PDF document text
    • http://paraleumarian.ro/app/webroot/files/userfiles/files/tigarijorederujiv.pdfIn PDF document text
    • https://etcbt.com/userfiles/file/goxusidiziwisifugol.pdfIn PDF document text
    • https://cvssteelex.com/ckfinder/userfiles/files/2985760637.pdfIn PDF document text
    • http://cateringkieuan.com/uploads/userfiles/file/sovanatasibazotoxarafe.pdfIn PDF document text
    • http://mn-print.ru/ckfinder/userfiles/files/zijobelepezejixowifu.pdfIn PDF document text
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/31310456785.pdfIn PDF document text
    • http://hiroi-es.info/yamituki-n/uploads/files/pakomomexufetefatabuwuxe.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/32968057145.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=d%26d+3.5+dmg+pdfPDF 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_off0000d8fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FE 21868 bytes
SHA-256: 38b99ebe486a1b600d23fb99b767200a54c660f71ef7f6fa1b6c5bce51191a50
font_01_sfnt_off000110fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12912 9076 bytes
SHA-256: f695977626623e59fedb2fbedebd468d0acf89ff6f6ceafeb3cee4351ddee6c8