Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a1865142a4ffcfb…

MALICIOUS

PDF

110.4 KB Created: 2021-07-18 01:53:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 0445e23988bab7d767b309a45668b92b SHA-1: 26bb2340635d84cc0cc77538d6a3e4a558a565d8 SHA-256: 1a1865142a4ffcfbf9aa8c88d6611fe8151b6bdab44218db9661699c666af1c7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and a large number of links pointing to potentially compromised websites, suggesting an attempt to host and distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the download or redirection to these malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • 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.
  • 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://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/0b707b93afc5680ccc2c7b6c0931099f/veveduriju.pdf In PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5bcc4eb2cc---mupakegagipizato.pdfIn PDF document text
    • https://ikitellirezistans.com/upload/files/ripuvazizafijas.pdfIn PDF document text
    • http://bigandtallking.com/userfiles/file/58313833283.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/sexazegupusa.pdfIn PDF document text
    • https://diaochue.vn/userfiles/file/gixabenuzotokejivusot.pdfIn PDF document text
    • http://caramelitos.sk/files/75978546095.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/qlolb47sbhkkl50u5dq83mg2i5/72736833498.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/45037225576.pdfIn PDF document text
    • http://ssaisarang.com/ckfinder/userfiles/files/80048768537.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/letez.pdfIn PDF document text
    • http://gsemilia.it/userfiles/files/tozukokogo.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/2e1fba9738948bdeeb7bfcc6627923c6/11091414500.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1607a146d8bfba---vogejixibinilapuk.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/nekuno.pdfIn PDF document text
    • https://octvads.site/js/ckfinder/userfiles/files/kusupufikijejetirezexon.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/d8d63d1e701934bcb08546bdec7dafa0/43180119112.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160ba153d448d6---nurowobor.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076d1a984f29---885792645.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/ca68e3376ca0eec85d6d00ebca073681/mafolufixujepe.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/k9h0ufl4kf07gg1ejccqalom5b/81396016253.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aea01155f47---72747293354.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/7eb4fe573219a8882982cfe1e1ae2d50/sepazeguzafamulazujazik.pdfIn PDF document text
    • http://copelandreunionla.com/clients/6/66/66f6f3de7053633686652f51c4c00696/File/52868952183.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=earthquake+analysis+and+design+of+structures+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_off0001491b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1491B 18824 bytes
SHA-256: d753b0b5f737b73e8ed503aed6feed53a672b0dd4f05ad55debfc864f8e49284
font_01_sfnt_off000179b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x179B4 11336 bytes
SHA-256: aec6c321de103779c923dbd40b432b89056806080cb3c0fc703e1ea85e30286b
font_02_sfnt_off000193de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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