PDF malware analysis — malicious · 442edb053277a4c3

MALICIOUS

PDF

88.6 KB Created: 2021-07-21 18:03:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 6013bc1e41d9ea6c3857bfd16c5c7613 SHA-1: 5cc6e47b66a999f1922a50cb3a321f5de2a6aa39 SHA-256: 442edb053277a4c341810baec0b261b3a81f332ac0dff7961bbd546acb6fa842

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely intended to host malicious content or redirect users. The ML classifier strongly indicated maliciousness, and the presence of numerous external URIs suggests a watering hole or redirection scheme. No scripts were extracted, but the overall structure and heuristic firings point to a phishing or redirection attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9721

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://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5d10ced010---sepipejixajijasus.pdf In PDF document text
- https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/9s7b7tsu0iseg4vt0b1atph9kj/47741633273.pdfIn PDF document text
- http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca1ae96d888---masumenuzab.pdfIn PDF document text
- http://maychaybocaocap.com/app/webroot/uploads/files/banixifobovav.pdfIn PDF document text
- https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d11f8c553---zadad.pdfIn PDF document text
- https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/44a02f69d5a27ea7d1edce58b2f25598/84921119031.pdfIn PDF document text
- https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/n7m80eaasf9a9o0ufn0rhejlps/zelatemesefar.pdfIn PDF document text
- http://ecohost.ru/pics/images/file/zifejonakogodad.pdfIn PDF document text
- https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088937605777---mezazu.pdfIn PDF document text
- http://alpanelektrik.com/depo/sayfaresim/file/jedinej.pdfIn PDF document text
- https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/ae161ec3397642883c88022c4ef5799f/fugugobowazabex.pdfIn PDF document text
- https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160dee00603c86---7491607872.pdfIn PDF document text
- https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073aac5717db---83992744860.pdfIn PDF document text
- http://vertinu.lt/ckfinder/userfiles/files/93758465626.pdfIn PDF document text
- http://adice-area.com/pictures/files/siwesatiduwunitu.pdfIn PDF document text
- http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16070eb3f534af---59089697565.pdfIn PDF document text
- http://howsonfamilyreunion.com/clients/5/57/57b8fe7d350e782a16e6afc8bdcd6467/File/sazesepapezavesasasoposov.pdfIn PDF document text
- https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1608190e3e7c83---39998954154.pdfIn PDF document text
- https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/eeda686e19657598d059a837b6e081d3/46680790547.pdfIn PDF document text
- http://gallery4walls.com/upload/editer/file/50544349102.pdfIn PDF document text
- http://sgpeo.pl/users//file/98400127826.pdfIn PDF document text
- http://zetrade.cz/userfiles/file/22765560577.pdfIn PDF document text
- http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071e81cc30af---22645369632.pdfIn PDF document text
- http://dioceseofniranam.org/userfiles/file/84444972098.pdfIn PDF document text
- https://dogathermalhotel.com/resimler/files/38846238052.pdfIn PDF document text
- https://aldwalia.com/userfiles/files/86971413233.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=judith+christie+mcallister+to+our+godPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e9fe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE9FE	10804 bytes
SHA-256: `2892ca8859f5f9151bdb70b8cf506a96042ccccb983d02df5f4cd2916b1db8c2`
`font_01_sfnt_off000102b4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x102B4	2392 bytes
SHA-256: `1a82eb73d05f2214bc1bf2a83ae897a337a09507c2aa301ad8eb8a4a87bc7643`
`font_02_sfnt_off00010d20.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10D20	16688 bytes
SHA-256: `6ff932f8dc038b10802bc75912a8a04c00df8ad1cfb6bf23cad2b712296b3b44`
`font_03_sfnt_off000138e1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x138E1	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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