PDF malware analysis — malicious · 85324a36979f2f8d

MALICIOUS

PDF

70.7 KB Created: 2021-09-04 18:38:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: c48806b36340b6df71316f3f5c5b249c SHA-1: 380d0e61c9ccc53686df0c67cbb5abd5bb4df22e SHA-256: 85324a36979f2f8deac851051365fab3aa937e0c047186fe3ccf2699585053e7

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 or distribution mechanism. The ML classifier also flagged this PDF as malicious. The presence of multiple links to potentially malicious content suggests an attempt to redirect users or manipulate search engine results.

Machine Learning

Nyx PDF Classifier malicious score 0.5282

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 https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/7sguutbc6rp96dkvr2oagbn572/waladiridufubusinileg.pdf In PDF document text
- http://hanbangrd.com/userfiles/file/20210724184425_1643330556.pdfIn PDF document text
- https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf506d3558---luliwujoralinibolu.pdfIn PDF document text
- http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080fdb88c452---8537506044.pdfIn PDF document text
- https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/m11rkua5819grmi17s2miv7rj0/98974140493.pdfIn PDF document text
- https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b3b411e7b06---galabodafibedolobek.pdfIn PDF document text
- https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/dd253be99f247ff95fb78fc1d239ee8e/54885331473.pdfIn PDF document text
- http://galenbio.com/images/upload/file/taxapegudewomux.pdfIn PDF document text
- http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b6fcd4c4578---83152319839.pdfIn PDF document text
- http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e18034001f---wewujax.pdfIn PDF document text
- http://gemculture.com/userfiles/file/3685093257.pdfIn PDF document text
- http://ventexevent.se/uploads/file/jexaxine.pdfIn PDF document text
- http://goldnumber.info/userfiles/file/14396528557.pdfIn PDF document text
- https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160daeca6ac4cf---8222825226.pdfIn PDF document text
- http://innotack.com/userfiles/files/84342925276.pdfIn PDF document text
- https://kingwrapcarspa.com/upload/files/woruvubejedepar.pdfIn PDF document text
- http://www.biotanika.pl/upload/file/81188467281.pdfIn PDF document text
- http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160accffc07cb9---90523581659.pdfIn PDF document text
- http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/h572u4fgn74t9hjmj076blbo0i/wiwewulezufuvuwadosozas.pdfIn PDF document text
- https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/nhldpq5ltho3effgpm08ebvn28/4717921509.pdfIn PDF document text
- http://ilyxrace.com/userfiles/files/27152861439.pdfIn PDF document text
- http://goksirkrupskimlyn.pl/img/upload/files/bogosebovafonavawifup.pdfIn PDF document text
- https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/f652e8f88a3c913cda4a1000ec5d42fa/16172710731.pdfIn PDF document text
- http://studiomarazzi.eu/userfiles/files/76580505210.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=free+will+vs+determinism+essay+pdfPDF link annotation
- 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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000bd80.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBD80	15748 bytes
SHA-256: `bcd66c2274e027ba7eedf76d49c4fc7819e2f7b34956e90789bcd8e5cd2d5ab8`
`font_01_sfnt_off0000e578.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE578	10784 bytes
SHA-256: `21ba4a5596bf0f4af3f7d423ee4e3244e91d4e90317708ecded376e18e226927`
`font_02_sfnt_off0000fe56.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE56	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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