PDF malware analysis — malicious · 7a24b2fe46c5e920

MALICIOUS

PDF

89.9 KB Created: 2021-07-23 22:08:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 00bd3309c9ac2f17c3d79140e8e6c83a SHA-1: 827e6829f12e0050c3ffb7b2cf20fa8b6e9a77e8 SHA-256: 7a24b2fe46c5e920601261dde514c9eb65e15d0f466948e9562455b9cdbb13ab

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1055.012 Process Injection

The PDF contains numerous links, many of which point to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9932

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/e3326adb8c726bf1578661b954c3da09/20215483916.pdf In PDF document text
- http://animalscipublisher.com/files/upfiles/file/fuzotevuluven.pdfIn PDF document text
- http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c7a0db720d3---vovejaxa.pdfIn PDF document text
- http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609df68808f75---3628012688.pdfIn PDF document text
- https://cafesca.org/ckfinder/userfiles/files/9556436306.pdfIn PDF document text
- http://apexnepaltravel.com/userfiles/file/susixileko.pdfIn PDF document text
- http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a898118092f---27988594268.pdfIn PDF document text
- https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/411be5ee7a6a8fb4b546b87e0736f723/ridejijefepapiv.pdfIn PDF document text
- http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160a3bb5c92b0e---nenukudawototukojifabuw.pdfIn PDF document text
- https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160aad2078ad91---dalazumusoxeli.pdfIn PDF document text
- http://apcmagon.com/userfiles/19060616508.pdfIn PDF document text
- https://wrd13.com/force/file/fevozomapid.pdfIn PDF document text
- http://zs-oilfieldequip.ru/d/files/rinafanewaxo.pdfIn PDF document text
- http://tahi.hu/ckfinder/userfiles/files/sozudodelojalalamateru.pdfIn PDF document text
- https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/977f25e734cb1abfdb7541bef81f6ee2/95165558404.pdfIn PDF document text
- https://travelinnsuites.com/nbloom/fckuploads/file/11883704437.pdfIn PDF document text
- https://akapacha.com/userfiles/file/renesagap.pdfIn PDF document text
- https://stegopackaging.com/wp-content/plugins/super-forms/uploads/php/files/d8197ga7a0drt6uek12svjbhv0/80036473882.pdfIn PDF document text
- https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607b67949487f---30277212488.pdfIn PDF document text
- http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/9q6k1tj5lponv46ftbehtjfr61/35215000367.pdfIn PDF document text
- http://esoftland.com/userfiles/file/93028583685.pdfIn PDF document text
- https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/9h72fdb2dv4gv5u0mudbqgqtth/30474209143.pdfIn PDF document text
- https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d713c06e350---lifazo.pdfIn PDF document text
- https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e55a51c5b2---segexukodepevowasute.pdfIn PDF document text
- http://augustaelectricalwork.com/editorData/file/nawopidalav.pdfIn PDF document text
- http://chinocorporatechallenge.com/clients/6216/File/jixivevuxezukat.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=lobo+stoney+mp3+song+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_off0000faa8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFAA8	17124 bytes
SHA-256: `f58496b82ad2a9dedb82330c56b01abdb81632969dd3e1eb51ab5a6f9fd1309f`
`font_01_sfnt_off000127a0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x127A0	11012 bytes
SHA-256: `5b63cb45a032d08357bbe471e3525147ede7d212224015235b8cc175afba381d`
`font_02_sfnt_off000140f0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x140F0	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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