Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9248538ccce959a…

MALICIOUS

PDF

73.7 KB Created: 2021-09-19 08:54:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 32758e57a7f9f975b21465d2222ec5e9 SHA-1: 69ff1c6b1a109bfa8b71e7e0cb8c84309b75c29a SHA-256: d9248538ccce959ac3e9b8089041fe71a15d09dcca429f970ece531a31d0e2d6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains a link farm pointing to multiple compromised CMS uploads and disposable hosting sites, suggesting a phishing or redirection scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161440dc2150a8---fozufivebajex.pdf In PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/161408ba0cec2f---buzarit.pdfIn PDF document text
    • http://angerdress.store/ckfinder/userfiles/files/kavifesivajimag.pdfIn PDF document text
    • http://ct-tci.com/cttax/userfiles/files/dufafodumazutusatoja.pdfIn PDF document text
    • http://szwygs.com/upload/25595558440.pdfIn PDF document text
    • http://sk4education.com/ckfinder/userfiles/files/powavobuladaduguzezokorik.pdfIn PDF document text
    • http://ashioke.com/images/library/File/24511848963.pdfIn PDF document text
    • http://xn--oy2b19v1mb1yi.com/userfiles/file/51983865249.pdfIn PDF document text
    • http://labuchedeberce.fr/userfiles/file/paxokivelutijipeka.pdfIn PDF document text
    • http://kernenshepler.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/33267198116.pdfIn PDF document text
    • http://ministerium.pt/files/32468629944.pdfIn PDF document text
    • http://irina-beha.com/ckfinder/userfiles/files/60844053035.pdfIn PDF document text
    • https://www.q-jin.ne.jp/ckfinder/userfiles/files/jedilexodujujomivunisa.pdfIn PDF document text
    • https://fenicia.uy/fenicia.com.uy/uploads/files/4778500793.pdfIn PDF document text
    • http://erh-hu.com/userfiles/file/tivewujomulavewolala.pdfIn PDF document text
    • https://euchebnici.com/img/file/pilozozop.pdfIn PDF document text
    • https://propactionvehiclesuk.tv/userfiles/files/8389300196.pdfIn PDF document text
    • https://tidaksusah.com/contents/files/4439125443.pdfIn PDF document text
    • http://ombs.ru/uploads/files/xujupofibalanibalixedutog.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e17cd2e2c7---veguvatinijadaxevejuri.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161378435e8eb2---xukigujegusodasex.pdfIn PDF document text
    • http://tradeweb.es/userfiles/file/wavodesojevaluxuror.pdfIn PDF document text
    • http://hytechcommunications.com/userfiles/file/zedukimumajuguvezebiwud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=shiv+tandav+mp3+downloadPDF 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_off0000bd28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD28 10656 bytes
SHA-256: 67a913370384c3198b209a3bc46ef7732ee97232d9c6abbb4c0d5ac5d770d8ae
font_01_sfnt_off0000d56a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD56A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ed7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED7C 17096 bytes
SHA-256: b1f946cc6dff6c5c96d2bd41a38b2bb75cda0a71d570bebabfe0c41a95faf07d

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