PDF malware analysis — malicious · 6f778da4dc48f801

MALICIOUS

PDF

86.9 KB Created: 2021-06-26 05:23:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: 7ceea18f55bdd22407cde52126ee7c9e SHA-1: 89b2fd787e775f1791347df8430f5a835e61489a SHA-256: 6f778da4dc48f8010fd81f2d7905f47b60538332f5d3b5e835f1899f98a42f77

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm with numerous URLs pointing to compromised CMS upload directories, suggesting an attempt to redirect users to malicious content. The ML classifier strongly indicated maliciousness, and the presence of multiple distinct hosts hosting these links further supports a malicious intent to distribute harmful content or phishing lures.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

Heuristics 5

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 http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608746bad84a7---97494626870.pdf In PDF document text
- https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/4f010129046690320f62b4a731c15ad1/newojuvasaxata.pdfIn PDF document text
- http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/55ebc99b602c26af79810892a5f8d882/kezisutopiwux.pdfIn PDF document text
- https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/bbf39b4a61b782d5c1e1d10c4cda932b/5993812398.pdfIn PDF document text
- http://aldo-ins.com/userfiles/file/nakofede.pdfIn PDF document text
- https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc2ff8e8a5---88467992150.pdfIn PDF document text
- https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/62a978978db2942fc2039301b134350c/83565207345.pdfIn PDF document text
- http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c40719492ef---nozelekanatudegijumama.pdfIn PDF document text
- http://bowlinggreenhsclassof66.com/clients/b/bd/bdf8ab256cd88a603fc2b95a051c5839/File/11034916975.pdfIn PDF document text
- https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/u6je77e0euqr0sf9neh6ob9vkc/14285532034.pdfIn PDF document text
- https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/hop2pi5qei1s6684rp51lcc687/19923637574.pdfIn PDF document text
- http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078dbfa4ad9b---lusorebotub.pdfIn PDF document text
- https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2ceecc2e9e---31474291369.pdfIn PDF document text
- http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c1066dc06ff---69971760546.pdfIn PDF document text
- https://cosplay-expo.it/ckfinder/userfiles/files/vanifonojokapepabelap.pdfIn PDF document text
- https://majorsagilekvaros.hu/uploads/file/fivubofeworalu.pdfIn PDF document text
- http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076e7a446a13---40839621716.pdfIn PDF document text
- https://aviatroglo.fr/IMG/file/25238436475.pdfIn PDF document text
- https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160cf73cce9614---votujafilugaxefibiriweruj.pdfIn PDF document text
- https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/50546b6d2ea4951a1a419c7f46a460db/tekuxagal.pdfIn PDF document text
- https://motelandratecuci.ro/userfiles/file/tuvajanodunasejifokij.pdfIn PDF document text
- https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/ako2v699mhte8mtfgp6sstjt1s/bokozajilof.pdfIn PDF document text
- https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160708c68885d1---dumetororojedekidun.pdfIn PDF document text
- https://gastrotest.co/ckfinder/userfiles/files/laduzukaxonuj.pdfIn PDF document text
- http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b212817a10a---85383285732.pdfIn PDF document text
- https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/gusffc3f0o5fbn7eokbpmph4pf/jewabubadejefok.pdfIn PDF document text
- https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/62047cbe6927b73254056f1de676dc2a/85860038145.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=texting+i+love+you+in+a+cute+wayPDF 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_off0000f395.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF395	16616 bytes
SHA-256: `c3dcc0a2fec6db15d4d5210b693fe48754ac8462e9f2ba63768f2151b5d8b3e6`
`font_01_sfnt_off00011da9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11DA9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000135c0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x135C0	10568 bytes
SHA-256: `cec69a9875f68bc8ee42c825bda5517f9505f7fd04d0d75e688a8ef891b6dc5a`

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