Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fc7463c77030df5…

MALICIOUS

PDF

96.1 KB Created: 2021-07-26 13:00:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6ed8301febb3b3b99b0db32a4d282abc SHA-1: 90fc7292527287a516ad6fac3a60bb296db2379e SHA-256: 2fc7463c77030df5a17ca4a909b2c0c53ee1c8b09edc80d951c3777b61cf85d2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/ad10654f1f5a30de3459e3295723d1f9/wigajawaveta.pdf In PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16097a521b2363---19959994314.pdfIn PDF document text
    • http://beiwendq.com/userfiles/file/vubodulagupirikepijozox.pdfIn PDF document text
    • http://beergolfers.com./blog/images/file/dewalovufe.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bb5f59604ea---tabesawutu.pdfIn PDF document text
    • http://centronegozi.com/public/sowifulijapenegewe.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/d02028366f1e88160993ce696c325872/56836533825.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/nipoxerejam.pdfIn PDF document text
    • http://talleresjpg.es/img/file/9605474839.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/mesorubelalol.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/99908057075.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e1c9815a9---23771621044.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f699ad6f0.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/40vtsfag8tpiv8keu7r7ktt7ju/wimeremiwax.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/1qpuadmkm0fut80rn72ricuqql/xitikolugun.pdfIn PDF document text
    • http://mylodge-naoshima.com/59295699579.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160846be40ec6b---16516410396.pdfIn PDF document text
    • http://clinical-pain.com/pds/userfiles/files/77344200842.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160800ebb26667---86945163742.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/fudofifiweruzaxavi.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/0625ad9bb050d58825d700c899d451cd/vutinipilux.pdfIn PDF document text
    • http://propellerclubsandiego.org/uploads/files/93692983151.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160d3ac691cd3b---nukixerebubokixogesop.pdfIn PDF document text
    • https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/3d6f7cb3f3c095f51c8247e6baa1d006/38309865421.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=bowerman+business+statistics+and+analytics+in+practice+9th+editionPDF 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_off000111bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000129d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129D2 11440 bytes
SHA-256: fe70511e7804c9c735dbf6c337e39a479d4c8dd70f2a4e5fd3ecd17b0974b713
font_02_sfnt_off0001448a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1448A 17320 bytes
SHA-256: 7bf85aa827a014ac7c64174fc68003c1316df634931449d4b844e8da38b8442a

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