PDF malware analysis — malicious · 8c484f1b3cf205af

MALICIOUS

PDF

71.9 KB Created: 2021-09-02 17:16:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: ddefec4f5a9a2e976c73f87306c32710 SHA-1: 6f02bec8b19b94583a8ee88b24c5468714631a29 SHA-256: 8c484f1b3cf205afe0d2d3617b0cda6cdd0f6e98de767d80cdc49d3134e3f995

94 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document functions as a link farm, directing users to multiple compromised WordPress sites. The heuristics indicate that these sites are used to host further malicious content, likely leading to exploitation or further stages of an attack. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

Nyx PDF Classifier malicious score 0.8295

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 http://dellalontra.it/userfiles/files/91086008018.pdf In PDF document text
- http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc379a4e21---buvovu.pdfIn PDF document text
- https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/0de3cfb3ad253e2ac60c394fddfc23dd/76769671539.pdfIn PDF document text
- https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/158ccc52dd88414fe4cd1ed236ecade8/xogukasutinufiwo.pdfIn PDF document text
- http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160cb4071f2338---42396695503.pdfIn PDF document text
- https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/1a6d30f53e07dd56438f4a713a1a25c8/41418064282.pdfIn PDF document text
- http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca0730b469---bagesifarodil.pdfIn PDF document text
- http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/v2t5lgihkjsc807pp88cbitbpb/duxogarozesuk.pdfIn PDF document text
- https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072e176ad096---62883947271.pdfIn PDF document text
- https://confetti-seasons.ru/upload/files/razuxabof.pdfIn PDF document text
- https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160726ce1b5ecc---75109260663.pdfIn PDF document text
- https://numen-wow.com/userfiles/cloud//files/sewizatamiwevil.pdfIn PDF document text
- http://kuhomania.ru/ckfinder/userfiles/files/vapenibebisojap.pdfIn PDF document text
- http://ambulatorioveterinariomariani.it/userfiles/files/58949130413.pdfIn PDF document text
- http://studiotecnicoligioni.com/userfiles/files/xexalitadokurusak.pdfIn PDF document text
- https://divinenine.net/userfiles/file/51829313759.pdfIn PDF document text
- https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/jq2dkjn6sf7de9ji8pm9kthd36/11505578712.pdfIn PDF document text
- http://3e-machinery.ru/app/webroot/filesfiles/futulanuje.pdfIn PDF document text
- http://dalnoboy.net/data/filestorage/upload/files/lesukas.pdfIn PDF document text
- https://www.milestonesmn.org/ckfinder/userfiles/files/59237466430.pdfIn PDF document text
- http://gruppocaminiti.it/userfiles/files/rogewidelutu.pdfIn PDF document text
- https://tele-video.ru/upload/files/ludojibawulupe.pdfIn PDF document text
- http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608efad47f8aa---tagitenojob.pdfIn PDF document text
- http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16084ce0a45f57---xazevofupibusig.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=math+worksheets+year+6PDF link annotation
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e091.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE091	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f8a8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF8A8	10416 bytes
SHA-256: `49712d9e3737e8aa3126ee90b651086d481db26cbb6d1305d9c2964024f03039`

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