PDF malware analysis — malicious · 004f73c03ecb71b2

MALICIOUS

PDF

79.1 KB Created: 2021-06-28 12:48:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: 2268e6df7cfca1e8397349ee4ce1d5d2 SHA-1: a497e7a1061672146ddf77cb7b05197d2d9ab428 SHA-256: 004f73c03ecb71b2354caf0410d809ee7ddd8991b7d87feef60d810ca3147e53

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document exhibits characteristics of a link farm, with numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The ML classifier strongly indicates malicious intent, and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic confirms the presence of a link farm on potentially untrustworthy hosting. The primary purpose appears to be redirecting users, potentially to phishing sites or to download further malicious payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9846

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 https://metricgroup.it/uploads/file/63088602696.pdf In PDF document text
- https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/b6t51j7rgu8352tl7gs8hrop86/30677185921.pdfIn PDF document text
- https://foundryindia.org/userfiles/file/retexirupukagopesevagix.pdfIn PDF document text
- https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bc011d417de---dewiwuvozurulifimupakedet.pdfIn PDF document text
- http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/c0ae1d759615d9c37c5229eaaac5303f/fegunemad.pdfIn PDF document text
- https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d508819e3f5---3547948927.pdfIn PDF document text
- http://aklond.com/UploadFilesfile///2021051006552235.pdfIn PDF document text
- http://sunrui-ti.com/d/files/18490862166.pdfIn PDF document text
- http://baohanhranghm.com/upload/img/files/20462919594.pdfIn PDF document text
- http://decaiyun.com/upload/file/2106280637139441737s2m98vliy4a.pdfIn PDF document text
- http://svaz-podnikani.cz/files/file/rukojiwuvojifabujiget.pdfIn PDF document text
- https://thefencedocumentary.com/adminfiles/file/wateb.pdfIn PDF document text
- http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a301b26c132---96340296966.pdfIn PDF document text
- http://aggengr.com/uploads/CMS/file/3562969085.pdfIn PDF document text
- https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7906f538ff---warusebonekoresu.pdfIn PDF document text
- https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/dafe6d21a15d11e629d00d4e9ea94773/71659161913.pdfIn PDF document text
- https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d0849249994---sukununadofusubonijoridol.pdfIn PDF document text
- https://www.jedeminute.de/wp-content/plugins/super-forms/uploads/php/files/luana9kns5aq8oio65fnt9bf2s/furavaletexonevowenogi.pdfIn PDF document text
- https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/30884fa24241f60657a1cc341ae954c8/nixojumezutunofom.pdfIn PDF document text
- https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7b620c9c2---38040267941.pdfIn PDF document text
- http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b06ba44daa9---wufanem.pdfIn PDF document text
- https://bandai-k.com/userfiles/file/41002729241.pdfIn PDF document text
- http://klasykarozrywki.pl/public/images/fck/file/59035729921.pdfIn PDF document text
- http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16089dd887a406---94082816913.pdfIn PDF document text
- https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/0d80533138f85b26fb20f062285ba265/wiguzuwedowudepilezoluko.pdfIn PDF document text
- https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a343cbaa60d---kasiripudekiniwe.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=power+electronics+circuits+devices+and+applications+pdfPDF 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_off0000d0c7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD0C7	10864 bytes
SHA-256: `4c48af11c35a83a6fe9ea3ba25fee19405ba8f819306a6737282891098e16154`
`font_01_sfnt_off0000ea1a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA1A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001022c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1022C	17008 bytes
SHA-256: `de8e368294abdf28b7d2b3a4f6e263c9f32949a44dfdae92725e6db548f1a3dc`

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