PDF malware analysis — malicious · d9f76eb6c84400aa

MALICIOUS

PDF

82.7 KB Created: 2021-07-28 08:20:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: a3a25ce5447537473c8a4c07258baa51 SHA-1: 7000b1b42911b051334eec93ff459ff21ac84c66 SHA-256: d9f76eb6c84400aaaf62947e7805d1fb5be6589be112983aec133550b476ba2d

104 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier strongly suggests malicious intent, likely to lead users to phishing or malware download sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9978

Heuristics 6

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://www.odnpoznan.pl/fotki/file/file/zugowatopetojuvedaligabo.pdf In PDF document text
- http://pogservice.ru/userfiles/file/83709552490.pdfIn PDF document text
- https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/br3bd6k5dutr386512ofee7hs1/mebuzeginawijamo.pdfIn PDF document text
- https://questyme.com/userfiles/file/sibaju.pdfIn PDF document text
- https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/5m924rrmrge8i29k3id824h2p2/55768677539.pdfIn PDF document text
- http://mcutech.net/files/wadiwajotew.pdfIn PDF document text
- https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/7e879fec3f734bac3fe71b276c23bfb8/tatitafobotitekat.pdfIn PDF document text
- https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/8a8e33bad5c90a980503ea2488e3363f/83595891190.pdfIn PDF document text
- http://grandrosso.com/js/upload/files/rozirowutefelabaz.pdfIn PDF document text
- https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c0e63e0b4cd---96484946933.pdfIn PDF document text
- https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/1c3a80c38abb7bc7f70592dfb1d32662/nagenutijixuja.pdfIn PDF document text
- http://spostojow.pl/userfiles/file/90780171899.pdfIn PDF document text
- https://jokerprod.net/userfiles/file/73185521202.pdfIn PDF document text
- http://fixafilm.se/userfiles/file/funuduxagazufog.pdfIn PDF document text
- http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b21dfd8e4de---99546160960.pdfIn PDF document text
- https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/r97ufp6o070ddste2nb0fbrvhb/jikumijaxetexol.pdfIn PDF document text
- https://datajournonepal.org/files/40708652892.pdfIn PDF document text
- http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079b9eeb2581---93520190475.pdfIn PDF document text
- https://aptitudeclass.com/ckfinder/userfiles/files/53954117561.pdfIn PDF document text
- https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/9d7e85e757a4b18166832fbb93f0d47f/ridalepekidusetiwokajaxux.pdfIn PDF document text
- http://doo-san.com/userfiles/file/20210517213244.pdfIn PDF document text
- https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607916a237e2e---63752007731.pdfIn PDF document text
- http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/5id100ktvitp9dqfl1v2ift1tq/23219720039.pdfIn PDF document text
- http://diysmart.net/userfiles/file/bulebeva.pdfIn PDF document text
- http://hanleyresources.com/images/peberoxup.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=cheech+and+chong+next+movie+free+downloadPDF 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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000de44.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDE44	16844 bytes
SHA-256: `6d67624a61256dd4264b73c06bb061c63d582a0e23ecf22a8064ce2dcbaf134a`
`font_01_sfnt_off000109fe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x109FE	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012215.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12215	11040 bytes
SHA-256: `7b0d942695f8e329ff96d63d976e3c10067f1bdcaa781f3f1f5679f08f3959eb`

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