Malicious PDF — malware analysis report

Static analysis result for SHA-256 dee33e1637838cd3…

MALICIOUS

PDF

81.8 KB Created: 2021-09-04 21:16:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2eb78c01389efa355a14b1f7ce1ac6da SHA-1: 490365b3469904e6a1a9e81314bd00cbe13080fd SHA-256: dee33e1637838cd32c2d0587e6be2194973337e14b0e3792ef5d4fda0e213283
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The file's structure and embedded links indicate it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609af80d206ab---murelitizubigorutefupefa.pdf In PDF document text
    • http://fitviewer.biz/files/file/felisapuvutujipagikaxo.pdfIn PDF document text
    • https://aashianarealty.com/file/36065318858.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1611240e564229---94431150826.pdfIn PDF document text
    • http://bobhendrix-law.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dakobubetoxunakokafa.pdfIn PDF document text
    • https://rieker-consulting.eu/files/file/xemenolubuso.pdfIn PDF document text
    • http://moestuinwebshop.nl/userfiles/file/11855936338.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df2126311f9---27904193257.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609b10b60d721---72598432859.pdfIn PDF document text
    • http://mramus.com/fck/imagesfile/34154654613.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c887e307a6---92379656643.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2d51cd631cb33890dcf71052e83ec02a/99262153283.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021051816081172.pdfIn PDF document text
    • https://essaidafm.com/uploads/FCK_files/file/nigedemoxipiku.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099f18d37230---33711747524.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/gejowinog.pdfIn PDF document text
    • https://burgas-remonti.com/userfiles/file/39937899720.pdfIn PDF document text
    • http://jilienjrubin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jodewuvubabisopezaj.pdfIn PDF document text
    • http://www.childofafrica.org/media/userfiles/file/filebekurawa.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607d30f75d563---jomexonajifolawavatukuka.pdfIn PDF document text
    • https://dacsanmyhuongbeti.com/app/webroot/files/images/pages/files/fazelopizevuzeg.pdfIn PDF document text
    • http://proxima-design.cz/files/file/6017950300.pdfIn PDF document text
    • https://stdtekstil.com/upload/ckfinder/files/tuked.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/59762bf90429bb6c77c27d371861010b/61232151253.pdfIn PDF document text
    • http://tourister.kr/userfiles/file/luxipivorasodanox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=common+noun+and+proper+noun+exercise+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_off0000db8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A4 10868 bytes
SHA-256: 5c50e7057b7d7543f7f5c6d458b7b183e9df749c2c626e49c88bc32f36eaf492
font_02_sfnt_off00010cbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBB 17440 bytes
SHA-256: d70997b5d5d994e2ce73c229f803ed19f7a246ff6a9366f9d18f3b68f6055bef

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