PDF malware analysis — malicious · e7f2777aff8d2c11

MALICIOUS

PDF

80.2 KB Created: 2021-08-29 01:47:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 7ec206c0928bc9cb899b0bbfda2b4ff4 SHA-1: 6b835d324039b7da9da126ccff76f92fa48ef2e2 SHA-256: e7f2777aff8d2c11435b57cde1a9b7b14fa80e90ed2fc156368efebc2fa742fc

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, characteristic of a link farm used to distribute malware or conduct phishing. While no scripts were explicitly extracted, the PDF structure and link farm behavior suggest it's designed to redirect users to malicious content, likely as a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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 https://duext.com/wp-content/plugins/super-forms/uploads/php/files/1a91b35829e4baddc30ca7f131015a57/pabudeg.pdf In PDF document text
- https://tramtron.vn/uploads/files/files/buwarasukazisukaj.pdfIn PDF document text
- http://madinaboys.com/easydo%20v2.00/files/uploads/kakujiwu.pdfIn PDF document text
- http://fixafilm.se/userfiles/file/vekepimopanofusuze.pdfIn PDF document text
- http://erfaspot.com/resimler/files/49760620221.pdfIn PDF document text
- http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1572acfd03---tezavinisaxa.pdfIn PDF document text
- https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/c3ba34b37bd7cccb6f65d48d4e164166/68671546355.pdfIn PDF document text
- http://fullerton.kopanramen.com/uploads/files/dafutaganebegipudedoza.pdfIn PDF document text
- https://distriparkbotlek.nl/userfiles/files/pugorakikuradura.pdfIn PDF document text
- https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/5da0f18adc723937d69b96abf1e27b96/bakabepativixa.pdfIn PDF document text
- https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/30119577e14b6334ecd0bfc5842cffca/71023661467.pdfIn PDF document text
- http://josephpowellfamilyreunion.com/clients/0/04/04c15d356d3082020e114f8c0300f46e/File/wuxavelamotemexudomazudex.pdfIn PDF document text
- http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4d32de13c---melafakobuvonosos.pdfIn PDF document text
- http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088b6d5847de---34176481065.pdfIn PDF document text
- http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb0cca8957---20210668711.pdfIn PDF document text
- https://wisestudentz.com/userfiles/file/41342534432.pdfIn PDF document text
- http://ngnjl.com/userfiles/files/vomuginupubenimiwotokosu.pdfIn PDF document text
- http://nhadep30giay.com/uploads/image/files/68087541366.pdfIn PDF document text
- https://hygradeinsulators.com/images/uploads/file/laxorelujumiwu.pdfIn PDF document text
- https://xosobacninh.vn/webroot/img/files/92207120024.pdfIn PDF document text
- http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca9f151512---vonadako.pdfIn PDF document text
- https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/d2mcetvt8gh8ero67um699ato3/ruwotevubabiviwe.pdfIn PDF document text
- http://pphu-joanna.pl/fckpliki/file/13345065808.pdfIn PDF document text
- http://trlgpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/94798693510.pdfIn PDF document text
- https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a87db391dfc---nadaje.pdfIn PDF document text
- https://protradingindia.net/userfiles/file/remufudatovudun.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=the+atp+made+during+glycolysis+is+generated+byPDF 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_off0000d149.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD149	17968 bytes
SHA-256: `09dd1f0b71be7fb222eca27b00b45a916adb05e4c54265894f980cfd76576f35`
`font_01_sfnt_off0000ffad.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFFAD	11276 bytes
SHA-256: `8cda7f9ab832bed86f5529d539ec69ab78efe98878190db30bb8033ca46176f9`
`font_02_sfnt_off0001198a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1198A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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