Malicious PDF — malware analysis report

Static analysis result for SHA-256 7297fd338333a97f…

MALICIOUS

PDF

79.0 KB Created: 2021-09-02 00:43:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9146ae678d0ae0585db220d47bf5ffac SHA-1: 5b564f48e7ff3ce21bdd0278be42d174de891b15 SHA-256: 7297fd338333a97f5a30247294e64c44b937e01ffee69f744820ae084e4ec550
94 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to other PDF files hosted on compromised websites, indicating a link farm strategy. The ML classifier strongly flagged this PDF as malicious, and heuristics identified it as a link farm on disposable hosting. While no scripts were extracted, the structure and URL patterns suggest an attempt to manipulate search engine results or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9092

Heuristics 4

  • 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
  • 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://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607caebcd4798---46299700430.pdf In PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/a554b17e574496f30bc182753d23d16d/vegib.pdfIn PDF document text
    • http://szsahsh.com/uploads/files/692922488.pdfIn PDF document text
    • http://auburn-properties.com/userfiles/files/jomabezobutolulav.pdfIn PDF document text
    • http://santeh.md/img/files/koradef.pdfIn PDF document text
    • https://kidneystonetreatment.in/userfiles/files/borubaniwodimedululomitew.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/df4e4d217fc941ceb0245ffbdaaa7c3c/55739031290.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb6c3aeedb---bepini.pdfIn PDF document text
    • http://izdo.org/img/userfiles/files/malitomazoto.pdfIn PDF document text
    • http://dailymaytrogiang.com/userfiles/files/luwegapajusup.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607710e195d4d---xorenenodutonomilapibo.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/322ab1bf850b677df1650002e145b093/badijaxanavifuma.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610d350b0b976---48560358572.pdfIn PDF document text
    • https://ngaa.org.au/application/third_party/ckfinder/userfiles/files/pefakabegexe.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5292a6663---5941206742.pdfIn PDF document text
    • http://banglenhospital.com/UserFiles/File/30873715236.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/zusujinoxuzi.pdfIn PDF document text
    • https://reniuved.it/file/kopidibikurujafi.pdfIn PDF document text
    • http://familiesforfamilies.ca/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/basid.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160eca0d97e86c---11047150500.pdfIn PDF document text
    • https://malabarmail.com/ckfinder/userfiles/files/9277372567.pdfIn PDF document text
    • http://nhuaduongnhapkhauaz.info/upload/files/52645762566.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=red+cabbage+ph+chartPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102FD 10448 bytes
SHA-256: b94c8a41d5f2fde6521799b789ba4cbb0e66d6a8ef2cfe516eddddeccbb47fc9

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