Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ff47bcf3e9f62d0…

MALICIOUS

PDF

85.9 KB Created: 2021-07-13 20:54:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 307b2a7f2c4bf4d5d662f68ab5ddb0d8 SHA-1: 7e30c3de33a400d8f45116a463194e1a456a8ffe SHA-256: 3ff47bcf3e9f62d05a2d1d2155e4048d0912643ae3f6a9f0d7d98a989d77f83b
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The document body is unreadable, but the heuristics and URLs point to a pattern of directing users to external, potentially compromised, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098bfb62810f---83167740003.pdf In PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608398b714dc6---vinepudafewujub.pdfIn PDF document text
    • https://suma.ca/upload/editor/file/63756114460.pdfIn PDF document text
    • http://vogiantinhmach.com/media/ftp/file/lojawuxozowalese.pdfIn PDF document text
    • http://mabifitness.it/userfiles/files/8069622398.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d681bae0afd---20112032676.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/dilunoxezufevatakiziveru.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/96f76a51f4c764ea43d6303e6e8808d3/61451023154.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/46745502263.pdfIn PDF document text
    • http://adveotec.com/img/file/gusugatuv.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/4afd03a98da759c40e2b5289392ad7c5/vizawefi.pdfIn PDF document text
    • http://nbpcpentecostalchurch.com/clients/65183/File/45265579771.pdfIn PDF document text
    • http://aahsclassof1978.com/clients/b/b6/b6117739535924054831d33ecd54b00a/File/16944783472.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/614bdb9376e8e28585cd234f4c0769b2/boxiloxo.pdfIn PDF document text
    • https://aashianarealty.com/file/86880853757.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b7975d94c---virak.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d44bf491ce---26695048881.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16078ce3b9cbce---71528306243.pdfIn PDF document text
    • http://netpost.vn/upload/userfiles/files/21950992967.pdfIn PDF document text
    • http://wamer.org/userfiles/file/46833759938.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/1aff6c486159f22f03e11cfc72968ae9/22059801688.pdfIn PDF document text
    • http://mashtalkandil.com/userfiles/file/4329499515.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec8a0bd3bc---74136406219.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=cares+act+student+relief+fundPDF 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_off0000edbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBC 10480 bytes
SHA-256: 247e9919191700d8b0e06c991a101ed670dd30656dc70a8770e95b2c502d78b6
font_01_sfnt_off000105a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011db7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB7 17024 bytes
SHA-256: 3e2c9adf820226045be2fae8ea11ba4c16b4341da01cfc44e131ff6b03f15e3a

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