Malicious PDF — malware analysis report

Static analysis result for SHA-256 dea47151ba12243a…

MALICIOUS

PDF

82.2 KB Created: 2021-09-12 22:16:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8b87e814e295d9b320d4dd8940fea26c SHA-1: 89e59fdd5d1bd2292d23c46e5b593078e5fd5855 SHA-256: dea47151ba12243acf47ef088b5900999cf37918ba3b88da6d95e89408b31326
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised websites, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, potentially leveraging embedded JavaScript for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://pistant.ru/uplcv?utm_term=download+film+something+in+the+way+mp4 PDF link annotation
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/c42b6df99fd3e515bc82e8798a401aed/jususesimasoteka.pdfIn PDF document text
    • http://linpus.com/app/webroot/userfiles/files/zuropobazopazufexumowisam.pdfIn PDF document text
    • http://locthanhroyal.com/upload/files/56422117153.pdfIn PDF document text
    • http://alrabbanoilandgas.com/file/files/turaruzokiwutovinus.pdfIn PDF document text
    • http://kiddeefire.com/media/userfiles/files/27368075714.pdfIn PDF document text
    • https://dichvuketoansg.com/luutru/files/nedelerifukufa.pdfIn PDF document text
    • https://aquamedicasatumare.ro/ckfinder/userfiles/files/49998745029.pdfIn PDF document text
    • https://zippy-inc.com/app/webroot/userfiles/files/vefevufugusadilo.pdfIn PDF document text
    • http://ty-int.com/files/files/51712396320.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613a459baa8cb---peloxebulekogubamama.pdfIn PDF document text
    • https://traveletrust.com/basefile/traveletrustcom/files/35171805435.pdfIn PDF document text
    • http://bigbulkbags.ahmadpackages.com/survey/userfiles/files/2327520405.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/8190055646.pdfIn PDF document text
    • http://skupka23.ru/upload/m/20652713270.pdfIn PDF document text
    • http://dietaltop.com/userfiles/files/gezadebedemorotem.pdfIn PDF document text
    • https://fuoriscena.eu/file/lixivufepuwamijar.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613ad73adf32e---89987712379.pdfIn PDF document text
    • https://giverny-bkk.com/upload/files/gububusexevuxulomeri.pdfIn PDF document text
    • http://yongchengtech.com/uploads/files/202109021520312302.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134aa23f156e---tefutaxowovug.pdfIn PDF document text
    • http://poultech.net/d/files/vuzavetukojinarepagixov.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/37947568767.pdfIn PDF document text
    • http://lednotice.com/userData/board/file/karodubotefo.pdfIn PDF document text
    • 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_off0000dbff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF416 11124 bytes
SHA-256: 832a3f11ab98ba292d91d5371cbe412b4789f47f1fba2d56ba0c1ec1b79c314b
font_02_sfnt_off00010dbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DBE 17476 bytes
SHA-256: 58e77144ef9471774850b37204980d91ffdc7b0e1afd061261543a68c71c215a

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