Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a19c225f435f860…

MALICIOUS

PDF

88.1 KB Created: 2021-07-19 18:57:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 3baab9610a1ad2bf21d9634aef345cba SHA-1: 71cfc83af34798d31e1c9e8bf3ceca9647c36c9d SHA-256: 8a19c225f435f8608dcb99f5eb5c25080d8402fced160d395af15660ac30d78a
124 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The heuristics indicate that the sample includes external URIs and points to raw IP addresses, suggesting a redirection to malicious sites. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a malware distribution or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 7

  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://porpora.biz/imagenes/imagenes_contenidos///gofelajawaxu.pdf In PDF document text
    • http://escuelasfutbol8.com/docs/files/40972345806.pdfIn PDF document text
    • https://kultmotor.hu/images/files/kejuratexefudapodazi.pdfIn PDF document text
    • https://intellicapital.in/ckfinder/userfiles/files/kikivekesedexobofiv.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/8700ddeed76f178f72c7e634096d454c/tafebenuva.pdfIn PDF document text
    • http://cherriestattoo.com/ckfinder/userfiles/files/75445693950.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/kijovivaroxako.pdfPDF link annotation
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/66134424026.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b03c80d46cc---51583684227.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/ef0e7af295d9574abe4213358288b9c7/20328359240.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16081130df042a---36758056411.pdfIn PDF document text
    • http://gewald.ru/content/Files/muriviragaj.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/198opi3b38agpi4emdcptd9fg6/82896204471.pdfIn PDF document text
    • http://bptramptour.pl/files/file/52704454074.pdfIn PDF document text
    • http://altiro.nl/home/tjerk/file/wazavudatojezokomuzoxuwew.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/tusafetop.pdfIn PDF document text
    • http://cungcapluonech.com/upload/files/dimisijasidaro.pdfIn PDF document text
    • http://mixmarketing.vn/upload/fck/file/wowadakefogu.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/d68cb479735270b8a34ec1c14b3189cd/34299179569.pdfIn PDF document text
    • http://luingpyrex.cz/foto/Image/file/95496958803.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a795485a036---raxalo.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c877559ea92---58438364901.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/160b40abde3b52---dewobunowokasebuzolimifoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=fast+leveling+shadowlandsPDF 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_off0000f5d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D1 17508 bytes
SHA-256: 7f20ceda51d69665108985390cebe66929b38ade0e986e04647e1a3318b6c283
font_01_sfnt_off0001235b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1235B 10556 bytes
SHA-256: c0a7e03d3bd3838f3f7394a20e15797812c33704ef5090c725f37a9bad14ba70
font_02_sfnt_off00013b35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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