Malicious PDF — malware analysis report

Static analysis result for SHA-256 325b820d560c1ccc…

MALICIOUS

PDF

92.3 KB Created: 2021-07-26 22:30:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8bb6381e9170db6bca593eefe26782b3 SHA-1: b615e2a723caa3b6c08d9eaf7217ecd15f57af66 SHA-256: 325b820d560c1ccc23611755c3145c737a9f9b783086bec002a5eeb33964935d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains a link farm pointing to multiple compromised WordPress upload directories and disposable hosting sites, suggesting it is used to distribute or redirect to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/e75ce3021079e232cbc7e232d199ca45/11738111002.pdf In PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16093f9e03c5d0---72388998197.pdfIn PDF document text
    • http://gift-founder.com/archive/upload/files/rivadujagidufizevovirofo.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160944b7b1bd5d---24352396665.pdfIn PDF document text
    • http://krzysztofmalec.pl/gfx/fck/file/31320441241.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/13128eeee3837f557aae333fe69b90a5/542327759.pdfIn PDF document text
    • http://learnazia.com/fck/imagesfile/70914680065.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/7245908585.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/68530554910.pdfIn PDF document text
    • http://ailizia.com/userfiles/12911894020.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740082bf0d1---mixadevofebufa.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/ab7464e3344d3cc7a06c723a9396bc6b/19421489618.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210617015840_1211659342.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/qbaaqosb85mttbveg44q8nolib/zapegexidilufi.pdfIn PDF document text
    • http://nguyenthaotech.com/upload/files/lizariwobakazijuzale.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7d6e738bb---47995761637.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/6468684714113e93b9e0d7f336eb6fb1/7729926785.pdfIn PDF document text
    • http://chinamakina.com/userfiles/file/60307297848.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/cee59b808ef146316f12154d54638383/21957615281.pdfIn PDF document text
    • http://insureacompany.com/userfiles/file/gupudadikezutokejezegiv.pdfIn PDF document text
    • https://washlounge.in/ckfinder/userfiles/files/45341120745.pdfIn PDF document text
    • http://dorp.pl/userfiles/files/dafudeviju.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/72cb30309c393b8a0667021c067f4e29/14555327460.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=brain+powerpoint+presentation+templates+free+download+educationPDF 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_off0001023a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011a4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A4C 18204 bytes
SHA-256: db78b8d679eadd069724ba77b69adc87536c2b2fdc78abe64a4e7e4a4133a082
font_02_sfnt_off000149d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149D6 11020 bytes
SHA-256: 643009c57d402559bb9f630b8fd689d164f7e12e7fd881fedd6f872c340efba0

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