Malicious PDF — malware analysis report

Static analysis result for SHA-256 badd9728cf98c4f2…

MALICIOUS

PDF

70.3 KB Created: 2021-09-28 23:34:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f46689d84bea922259390b3c6144fa06 SHA-1: 1fcb168287b9f4afec76d4bf148ae2dba8194b1a SHA-256: badd9728cf98c4f245d503867a0d02e924a0dd1da376dfa28cca328fa85f6a47
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as a malicious PDF by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, with several pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to redirect users to potentially harmful content.

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://fruitssupplier.com/app/webroot/img/files/50463942482.pdf In PDF document text
    • https://vieclamday.com/userfiles/file/tezudovemek.pdfIn PDF document text
    • https://www.ocnistudio.cz/ckfinder/userfiles/files/89627119547.pdfIn PDF document text
    • http://handgun.ee/media/file/76828710321.pdfIn PDF document text
    • http://rainternacional.com/userfiles/file/nuropekiratub.pdfIn PDF document text
    • http://groupelamiri.com/uploads/FCK_files/file/62722059089.pdfIn PDF document text
    • http://deeringbayrealestate.com/userfiles/files/wijekebaniwulamuwezizido.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/8a7f7627859b6a04a519878e79886615/64794256535.pdfIn PDF document text
    • https://hotelmitrutarija.com/uploaded/files/dizusosija.pdfIn PDF document text
    • http://planet-for-events.de/userfiles/file/miwusuvuvewikexerumemawaj.pdfIn PDF document text
    • http://serviphony.com/tinymce/jscripts/tiny_mce/plugins/phpimage/phpimage/upload/images/file/bifumefufug.pdfIn PDF document text
    • https://jatransfer.com/userfiles/file/63832234029.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/d9350655324da58835ce89316028c74c/zegedetog.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a5ee931eb9---16830959541.pdfIn PDF document text
    • http://barsugo.com/ckfinder/userfiles/files/verijixezu.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/vuzebamadiximumalunofaboz.pdfIn PDF document text
    • https://reniuved.it/file/ralurivuvejurilenovunigi.pdfIn PDF document text
    • http://charolais-hessen.de/write/userfiles/file/maxixu.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/161425809d152b---3183567357.pdfIn PDF document text
    • http://interiorconsignments.com/media/file/22306647779.pdfIn PDF document text
    • http://bluelakehomestay.com/uploads/image/files/80664102659.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/4009385509.pdfIn PDF document text
    • http://newbiesites.com/userfiles/file/lolarenopanafotezun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=the+crew+2+fastest+drag+carPDF 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_off0000b07a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB07A 10560 bytes
SHA-256: 90b4735401476540b756f5201ec0534d7d26439a5600959f8a3eb6cb2e6af3be
font_01_sfnt_off0000c8a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A4 16724 bytes
SHA-256: a6a87350592d45c4e8d12441d8f9525bf5c62256cf51a56f3f3bb0431a48f4b9
font_02_sfnt_off0000f3b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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