Malicious PDF — malware analysis report

Static analysis result for SHA-256 5116c07abf8aa42b…

MALICIOUS

PDF

86.5 KB Created: 2021-09-05 12:46:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0905b6840ffce886a1f110a582405105 SHA-1: 45cee6e3812b4b4de947ec1ea2d215a8f56bd08c SHA-256: 5116c07abf8aa42bfb752dc48cd46280187828d6b76e1f8fde841026aee1a192
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm pointing to multiple compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://graficaeformazione.it/userfiles/file/gifaponipuliruwexuf.pdf In PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/04c57f7b48479dc7aebaef5c31ec0a6d/44418496545.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/9fefb0udr3g7dc1c3fu18ubggc/pidaxudekajefido.pdfIn PDF document text
    • http://seyrimerdin.com/userfiles/file/29049240467.pdfIn PDF document text
    • http://udaybharat.in/ckfinder/userfiles/files/95399614860.pdfIn PDF document text
    • http://learnazia.com/fck/imagesfile/91186761021.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/v7lm1aaf70rsjpbohn2prvjlku/tikopogugenelebawiz.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/6839f9da9f49fb9f06251409e46bf08a/22138898438.pdfIn PDF document text
    • http://miguktour.com/FileData/ckfinder/files/20210622_D25FF0BEF2275859.pdfIn PDF document text
    • http://vivo-mebel.ru/upload/file/rimupifikenoxizubulij.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/87a8ac450d1734aa5ee68ad3554a5142/73823993903.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/cb6c664d3bdbed5cb25c0b76bce856d8/91256510994.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/37096dfcf4f3eb0afff12e66abaaeb9c/44065069971.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/kirevorarorojoxopidesowaw.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/90dba087a077ee00834dca72461f7056/vapinotolulezal.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b4f462d3858---58107169695.pdfIn PDF document text
    • http://sosonomo.com/ckfinder/userfiles/files/5752773410.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/17ktvtalntki1rrgaghn7uo2d1/luwokuwigavabod.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/baafeaf2d812f66caedac1674c21c1de/sukomopovexowuvijakesekot.pdfIn PDF document text
    • https://www.pessin-location.fr/ckfinder/userfiles/files/17804941954.pdfIn PDF document text
    • https://didacostruzioni.it/userfiles/file/70298983911.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f045d1a7f79---61081478450.pdfIn PDF document text
    • https://primer-spb.ru/files/files/5847327447.pdfIn PDF document text
    • http://jyotiacademicpress.org/uploads/file/20110805497.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=din%C3%A2mica+f%C3%ADsica+exerc%C3%ADcios+resolvidos+pdfPDF 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_off0000e677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE677 11104 bytes
SHA-256: 92015274a4e1132ee564a5b3533ab9d9f72fde57d07fb4cf6adb5c25099bd271
font_01_sfnt_off0000ffec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFEC 19928 bytes
SHA-256: 47849dd875b4d257db7661258d1f4177ea1e6306db8468e0fd44a74ba41cbbd7
font_02_sfnt_off000131b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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