Malicious PDF — malware analysis report

Static analysis result for SHA-256 442e06981c2ccfbc…

MALICIOUS

PDF

70.1 KB Created: 2021-09-27 10:20:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: e9b7f02392fea3bec774f43890c701dc SHA-1: 1be0fed6a75b9398717c2d9176f62788ae297562 SHA-256: 442e06981c2ccfbc32c6f0ee3cf65608cfe548fe3896aa325c341458f373e3c9
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing lure. The presence of these links and the PDF's structure align with techniques used to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://imhome-listings.com/userfiles/files/tutekip.pdf In PDF document text
    • http://medob.org/SITE/files/editor/file/wimulabixebiw.pdfIn PDF document text
    • http://temple.mo/userfiles/file/fezejujukeliwi.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/ziluzigazituronoje.pdfIn PDF document text
    • http://donahoelawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vopefibomuruwafuxosinumo.pdfIn PDF document text
    • http://vencedor.coop/images/admin/file/50610773019.pdfIn PDF document text
    • http://mail-ex.net/userfiles/file/75263360979.pdfIn PDF document text
    • http://azizavacanze.com/userfiles/files/17498103289.pdfIn PDF document text
    • https://lorrainezammit.com/files/file/mosokubumesafekodojobumit.pdfIn PDF document text
    • http://www.sudeshnamaulik.com/fckimages/file/wunig.pdfIn PDF document text
    • https://maintogelonline.info/contents/files/rawazorope.pdfIn PDF document text
    • http://maiodi.com/userfiles/files/68084523349.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/66117310a3b8a19a9f5ddb6ca85f964b/62145389122.pdfIn PDF document text
    • https://corpus.bg/files/fck/file/98780572496.pdfIn PDF document text
    • http://abbeloosschinkels.be/userfiles/file/43775101870.pdfIn PDF document text
    • http://chinhsuasolieu.com/media/files/97918694059.pdfIn PDF document text
    • http://xn--eyt274i.com/upload/files/gixexikemaju.pdfIn PDF document text
    • http://freetourscadiz.com/ckfinder/userfiles/files/vajuzuvenigadero.pdfIn PDF document text
    • http://mh-gartengestaltung.de/userfiles/file/67731733395.pdfIn PDF document text
    • https://oncetrabzon.com/resimler/files/88977036363.pdfIn PDF document text
    • http://abwcockeysville.com/uploads/files/91596467897.pdfIn PDF document text
    • http://bestofbeer.ru/ckfinder/userfiles/files/fakatuxujabok.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613303d4b25c5---daragogukoje.pdfIn PDF document text
    • http://orderkai.com/uploads/files/68628072627.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=parahuna+punjabi+movie+download+hd+720pPDF 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_off0000b1be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1BE 15436 bytes
SHA-256: acfea75249b85c3f3ef5e865133ef834aed1768d520e5f0e3f1934dd4adc0b67
font_01_sfnt_off0000d8b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B8 11208 bytes
SHA-256: 071aac6231a6a2437fb12440521c983d161a650d5e1e7c1a1da224dcb7773f1b
font_02_sfnt_off0000f287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF287 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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