Malicious PDF — malware analysis report

Static analysis result for SHA-256 066e305fd867235b…

MALICIOUS

PDF

87.4 KB Created: 2021-09-05 12:28:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f94085dacf359f9822925f646360fb5e SHA-1: bb8735b5df09f92de4efea1857abedfc882b34f6 SHA-256: 066e305fd867235bf3a0951a6056492370e17112ecc3790db4d3639867537b59
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links to compromised websites, including WordPress upload storage, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://le27.fr/docs/file/mapiwedave.pdf In PDF document text
    • http://downtowncincyhotels.com/core_degree/admin/images/cms_imagesfiles/48363948937.pdfIn PDF document text
    • https://sim2007.com/files/95950245858.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d312cd622a2---xaxuros.pdfIn PDF document text
    • http://beergolfers.com./blog/images/file/24089904105.pdfIn PDF document text
    • http://nuovartea.eu/userfiles/files/69320921605.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa78034312---falakalezivesukun.pdfIn PDF document text
    • http://www.siposferenc.hu/html/12084131493.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/ce476d3d83355ef1e9114d77b1335242/3999338598.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b639388bc9---patujulakozijub.pdfIn PDF document text
    • http://erainbowrealty.com/userfiles/file/50581470863.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021051707551875.pdfIn PDF document text
    • http://blbr365.com/userfiles/file/1620875904.pdfIn PDF document text
    • http://dawahcity.com/userfiles/file/7684553035.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a04b9853118---59634873881.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d1ef11ded62---45864689870.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774bf249d41---64337753533.pdfIn PDF document text
    • https://moscowfashion.net/content/xuploadimages/file/6952677412.pdfIn PDF document text
    • http://christschoolblr.in/userfiles/file/gejinula.pdfIn PDF document text
    • https://aldapa.eus/files/galeria/files/pajubasexamogegezu.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/eogl2jtd8dfid4a4f38tevh2tf/52612737648.pdfIn PDF document text
    • https://99shayari.in/userfiles/files/vumopo.pdfIn PDF document text
    • http://4x4autok.hu/userfiles/files/20977051274.pdfIn PDF document text
    • https://jordanadams.com/ckfinder/userfiles/files/wafonexabiguwagu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=python+predictive+analytics+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_off0000eff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10805 17864 bytes
SHA-256: 564ed3b0b223bcc63896aeefb28321f21f7d8fbc94ca61e927c637db57d87c37
font_02_sfnt_off000136a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136A8 10896 bytes
SHA-256: 5ba6b57f24b139d18d64177d0251cf3d8392daaa40ac1285e91ce3847ec00f28