Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc65d105002e05f6…

MALICIOUS

PDF

91.0 KB Created: 2021-06-30 06:02:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b50cf9b931313bd642977f011748f8e0 SHA-1: 9ded2d1c1985c0ddc3a0d83da027e43a84844267 SHA-256: fc65d105002e05f600791c22ec93ae71c8303be15604a38da29876bd20e5a34a
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating it likely exploits a vulnerability or contains malicious content. The presence of numerous links to compromised WordPress sites and disposable hosting suggests a phishing or malware distribution scheme. No scripts were extracted, but the PDF structure and linked URLs point towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/rd07037dg932mef2kc3fnhrhu3/xifenanuvunalopizipo.pdf In PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077ce72ed834---gufili.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607feb09b5dfb---guvimonale.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa13a101f1---befonijowoxibarapok.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/xutimexarimokibid.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/xinamozuzalud.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/2decaff73d80e4c5677296a91f34d9ea/41885705260.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f41aa499b1---41698599909.pdfIn PDF document text
    • https://bevillelecomte.ovh/ckfinder/userfiles/files/lusakejiwob.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/8caf7756f18c0e7489db5f27829e772d/70656831077.pdfIn PDF document text
    • http://bscartridge.com/pic/gifisijomilexasuvev.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/92a5066a64c19459129e279d5148311a/99235618803.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce8b14dc49---gotatixanefolenabaguban.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0649595001619992054.pdfIn PDF document text
    • http://paliukenas.lt/i/File/sizexowuza.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/29666855177.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/24f4aa6eac7399415b6fd1e0431253c3/53928233467.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a431c90cafe---tofetewitu.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/27f54660b2302e37874d97cad0332145/kexobux.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/betax.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad247f2ca4f---tazuzawibevivapilamuda.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/68658b555061573ac86c6b6a268a190a/livemixororotugat.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/8a94bac3b94b299bb59965e78db2c0e5/dajot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=theories+of+organizational+culture+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_off00010386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10386 16336 bytes
SHA-256: 7ad8d52707853b2bf6187ee6a3b0498c11d585ed8c4afcbe51ec93e25a793486
font_01_sfnt_off00012d55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D55 11024 bytes
SHA-256: 835d950c30bddb8b20de0312c0c6b4ac0e3b244d5ece64587f6d2c8fc8fd9b0f
font_02_sfnt_off000146c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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