Malicious PDF — malware analysis report

Static analysis result for SHA-256 c00714452514faca…

MALICIOUS

PDF

69.4 KB Created: 2021-09-29 00:24:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 043b48d83abae9d55c48c88b54336529 SHA-1: 95f500f21a1e3189985d5642df41da9131641148 SHA-256: c00714452514facadf940e3b44e3432cb8e9adcf0dbca0453323887d7d736a0b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is a common technique for executing malicious code. The file also exhibits characteristics of a link farm, with numerous URLs pointing to potentially compromised websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136a49530550---zerivimevaretoluferoxarib.pdf In PDF document text
    • http://celesteandtorsten.wedding/images/file/razigarenen.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/s7tfj3g93u6mgec9s7guf854im/15792167043.pdfIn PDF document text
    • http://apothepharma.com/upload/files/24610398507.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/xubez.pdfIn PDF document text
    • http://i-p-p-c.com/ckfinder/userfiles/files/10250693594.pdfIn PDF document text
    • https://fisheaglesafaris.net/pics/user/file/4314998722.pdfIn PDF document text
    • http://due.pt/js/ckfinder/userfiles/files/kupat.pdfIn PDF document text
    • http://hzbmsj.net/images/upload/File/18308193636.pdfIn PDF document text
    • https://corpus.bg/files/fck/file/36054018498.pdfIn PDF document text
    • http://www.ramseier-appenzell.ch/elrada/js/ckfinder/userfiles/files/96041745335.pdfIn PDF document text
    • http://vipforiraq.com/userfiles/files/kivesiganulaleluku.pdfIn PDF document text
    • https://cs-nippon-cp.com/mailmagazine/upload/files/92316590807.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc4d8e2281---liludugovexotixif.pdfIn PDF document text
    • https://cfi-registration.org/buzzboxgift/img/userfiles/files/gapawasara.pdfIn PDF document text
    • https://073741256.com/uploads/files/202109041308467397.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/61144738133.pdfIn PDF document text
    • http://planet-for-events.de/userfiles/file/38231088023.pdfIn PDF document text
    • http://www.rify.us/cms-uploads/files/57645929087.pdfIn PDF document text
    • https://takarasushimn.com/userfiles/files/xabobotetusodomidojulifu.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/u46jeord5rn3fb3uinj09jgvp7/46302049058.pdfIn PDF document text
    • http://zmz72.ru/files/file/nibotedopifokobamijotug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+turn+off+sim+card+pin+code+androidPDF 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_off0000adc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c5d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5D5 16096 bytes
SHA-256: 3b88d1156ba3eba0c4d46a6c1cfda6f78f36d96db795b4a39b6e5476133a1f5d
font_02_sfnt_off0000eed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED9 10912 bytes
SHA-256: df037e3a56e6771562aff4a2e8dbaa6121ddfa8830b30389745f52dbdd2dd216