PDF malware analysis — malicious · 6e0fecb85c6cf25b

MALICIOUS

PDF

72.9 KB Created: 2021-07-05 04:56:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: dd278f88f1488ce836c2ee20b2e4c8d8 SHA-1: 924bfedfd178aa0ca300fcae69c2048927f30034 SHA-256: 6e0fecb85c6cf25b635dffbcda28c72d8cd68110e268dabb793a3475546e2374

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to numerous compromised WordPress upload directories, indicating a tactic to distribute or host malicious files. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent. While no scripts were extracted, the structure and URL patterns suggest an attempt to lure users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9893

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://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/8f7f59fbd875d211cc1ca9e5e01aa868/gosojowekitaxafozov.pdf In PDF document text
- http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/25f9409a32c0dd03565b680b4a31ae85/ludidimu.pdfIn PDF document text
- https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/a2c96de1f337be71130a33df66b77d68/wunujuzezuvorujitolozowuw.pdfIn PDF document text
- https://contabil-fiscal.ro/mm/file/23096193393.pdfIn PDF document text
- https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/b8332a1b26921a9656d0dad6d269d339/lolutamugixufajami.pdfIn PDF document text
- http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/2d1d7d1dee3756098d96a7189355becc/jazimuzixageged.pdfIn PDF document text
- http://daivupaint.com/img-chamthi/files/96379147412.pdfIn PDF document text
- https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/9669a938dd1995e7e3e6cd57859f05c9/zideja.pdfIn PDF document text
- https://edarky.net/data/file/55526901485.pdfIn PDF document text
- https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/b5f0312a83c14949d471b76730b118ce/14102174188.pdfIn PDF document text
- http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/opim9777g1fvd750ea1j29mfs3/xobov.pdfIn PDF document text
- http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16092e585c25d9---xegufejazuwixetumu.pdfIn PDF document text
- http://eco-versute.com/app/webroot/ckfinder/userfiles/files/40314598284.pdfIn PDF document text
- http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/d0bd79787fcb2685ceee3f5c00370119/fakelelu.pdfIn PDF document text
- http://scandirent-new.ru/uploads/assets/file/kuwabujixek.pdfIn PDF document text
- http://rydelko.pl/userfiles/file/jonemubajirezurenobel.pdfIn PDF document text
- https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/0da510fddcdb2e2a08d741c6879c95f3/74584831903.pdfIn PDF document text
- http://wmehoa.org/clients/d/df/dff1b85474dadb967ea0c40f6d5e37f8/File/83745620137.pdfIn PDF document text
- https://toskov-yordanov.com/userfiles/file/84410717099.pdfIn PDF document text
- http://www.sphotobooth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160769b585b189---vesakowidusavuz.pdfIn PDF document text
- https://aslimitada.com/userfiles/file/36639006474.pdfIn PDF document text
- https://najlepsze-w-polsce.pl/uploads/15226030942.pdfIn PDF document text
- http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1fc7ef55c---birukumotologez.pdfIn PDF document text
- http://brianhaymore.com/images/e/file/44806677716.pdfIn PDF document text
- http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5cbb9f154---xeduxiweneveromikunu.pdfIn PDF document text
- https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/g7utgqnio26375733f9scgcjg0/50859013448.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=chemical+bonding+jee+mains+notesPDF 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_off0000bb47.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBB47	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d35e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD35E	11020 bytes
SHA-256: `a090adc78144279f7ab1c01989523cf60f5fcbf95c2b15ae9f2d81654f101f91`
`font_02_sfnt_off0000ec8f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC8F	16156 bytes
SHA-256: `e286d071c400a88272b1384ea5d16df76678640dc7ca16d0d541b42b0250d18a`

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