PDF malware analysis — malicious · a5df3ba97f5eb8e1

MALICIOUS

PDF

77.6 KB Created: 2021-09-04 06:27:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 05ee2203ddb3096b1acf23139a670acf SHA-1: cea00d6b440f9c2dc44f0f3439c23ef196330313 SHA-256: a5df3ba97f5eb8e15f676b5423d94f39594cec2ca9168b6001fdb35ebffd9fda

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains a link farm pointing to multiple compromised WordPress sites, indicating a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier's flagging further support its malicious nature. While no scripts were directly extracted, the structure suggests it's designed to lure users into clicking links that lead to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.5544

Heuristics 5

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
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://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/r09d9s2dm8jsnbdlt5otk2mq1m/95226066228.pdf In PDF document text
- https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4b6dca5f7f---mazetaje.pdfIn PDF document text
- https://comiconfezioni.it/file/74445844842.pdfIn PDF document text
- http://florylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kamuwuv.pdfIn PDF document text
- http://world-green-hope.com/uploads/files/17311853068.pdfIn PDF document text
- http://absolutelyneon.com/userfiles/file/lapugawixepikibojisa.pdfIn PDF document text
- http://jrmhandling.nl/upload/file/24768700416.pdfIn PDF document text
- http://jinanxintiandi.com/userfiles/files/fovagasasisebedasanapad.pdfIn PDF document text
- https://comobrew.com/newsite/images/user_uploads/file/xosigurijikel.pdfIn PDF document text
- https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/ac8083ad4c7061b8a14488a1fce63757/kuposelamijetudimub.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ec593296d---vuralanoli.pdfIn PDF document text
- https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ecab059b991---47866729814.pdfIn PDF document text
- http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160fb49059744b---20723456988.pdfIn PDF document text
- https://stallion-international.com/userfiles/file/50667492414.pdfIn PDF document text
- http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077a8f64e038---17417110896.pdfIn PDF document text
- http://xinyuemu.net/assets/202106/files/20210624144903930761.pdfIn PDF document text
- https://moulindelarroque.com/userfiles/file/xepixejojopipowokas.pdfIn PDF document text
- http://kagoshimakojintaxi.com/userfiles/file/fezanediravewoduxi.pdfIn PDF document text
- http://akcihlar.cz/userfiles/file/bawidaroguwonunirevusepog.pdfIn PDF document text
- http://mfcwestenkwartier.nl/beta/userfiles/file/45187279939.pdfIn PDF document text
- http://firmykominkowe.pl/Obrazki/edytor/file/damirezot.pdfIn PDF document text
- https://inprovitcaribe.com/ckfinder/userfiles/files/nitetugawogujivenujogagu.pdfIn PDF document text
- http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/bc5025831c53639ab9df7c2031221ab9/41049364518.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=lighthouse+keeper%27s+wife+pdfPDF link annotation
- 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_off0000dc59.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDC59	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f470.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF470	10736 bytes
SHA-256: `8845a8be47c14f10e03151420b39b3138a37f2ea25c467e3aeefcabfb655898d`
`font_02_sfnt_off00010d2a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10D2A	17684 bytes
SHA-256: `159a4e315350f6c3e173b438116f98192a86dacbba0576d5a38101072850e7f3`

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