PDF malware analysis — malicious · 05684a6b822278f9

MALICIOUS

PDF

93.5 KB Created: 2021-06-27 04:06:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: 9bb7b1b634a1163f0ea2245df6d6ab11 SHA-1: d0d33ce861589411de25c667ff1c998e69d7b582 SHA-256: 05684a6b822278f95f2dbbbd30b3e6f255932ec03c2091e2592d3c43a39e52c4

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was identified as malicious by ClamAV and an ML classifier, with heuristics indicating it is a link farm pointing to compromised WordPress sites. The 'SE_INVOICE_LURE' heuristic suggests a phishing pretext. While no scripts were directly extracted, the PDF structure and linked URLs indicate an attempt to deliver a malicious payload, likely a phishing document, to the user.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

Heuristics 7

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.
Fake invoice / payment lure low SE_INVOICE_LURE

Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/5da3d1898a3dcd77a6a71893ee4bfd88/89103256220.pdf In PDF document text
- https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5284891b0---gobenonuxapalosa.pdfIn PDF document text
- https://chetanaus.org/bheru/uploadfiles/file/78954657880.pdfIn PDF document text
- http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607025555d0f7---tokotesonilewumoze.pdfIn PDF document text
- http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdfefe2b05a---60200244654.pdfIn PDF document text
- https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/mq9tnprjtn8s77vf9mp70ak2mk/61944245617.pdfIn PDF document text
- http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d5bd87ceede---vesezilulaz.pdfIn PDF document text
- http://rydelko.pl/userfiles/file/49877563319.pdfIn PDF document text
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aacf8a5bb8f---95702778423.pdfIn PDF document text
- https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/r9lh7snuphtt6rgkaq5p3k3qs9/refofunezokaxoxakenuderip.pdfIn PDF document text
- https://gencshoworganizasyon.com/upload/ckfinder/files/gubejuwidaxesakaludel.pdfIn PDF document text
- https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e66fc17492---26896592351.pdfIn PDF document text
- http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/renovs5vj0338k9ue5oangjmc5/kusatavukakopakisus.pdfIn PDF document text
- http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160939f89aa1de---1972038118.pdfIn PDF document text
- https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f111a4a9fa---38199815805.pdfIn PDF document text
- http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8dc9a8b11---lofibavegedaje.pdfIn PDF document text
- http://alexlunacoach.com/img/editor/file/85587747794.pdfIn PDF document text
- http://zulassungsservice4you.de/bilder/file/22956573701.pdfIn PDF document text
- https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/a5c51bf2fa05eb9e255694213d44820b/7444361415.pdfIn PDF document text
- http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947d7a5140d---35969714291.pdfIn PDF document text
- http://raiders71.com/clients/4/41/4134020f2f298c111575624a380fabfc/File/jekuk.pdfIn PDF document text
- http://sarlampa.ru/upload_picture/tusinowokuweroxusexow.pdfIn PDF document text
- https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/1e6ae4170b6f6abe82ad88cf3659079d/46615562412.pdfIn PDF document text
- https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/ff9bd70461fb3f5a5831534a7a870882/58576934258.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=letter+of+authorization+sample+docPDF 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_off000106e2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x106E2	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00011ef4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11EF4	17756 bytes
SHA-256: `45e3b4c0656a75f5fd3fe7b6adba987bd21e1f5afd3447516bcad81df49c5459`
`font_02_sfnt_off00014dcf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14DCF	11004 bytes
SHA-256: `8d73dc15e07ec8d67c6eae54317758e87f4f20b0a46c115d13d7c4a3e3d88af0`

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