PDF malware analysis — malicious · bcc8d8971d7252a1

MALICIOUS

PDF

75.5 KB Created: 2021-09-07 10:45:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 360f18943abe1f813f42b880828f98db SHA-1: 5b3319511387e1dd8e342d3a5fcc268209a33bce SHA-256: bcc8d8971d7252a14c866b8d6e82602bd018eea1155acfcf6d48ce499dd98ddc

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The primary attack pattern involves using the PDF as a lure to drive traffic to these external sites, likely for phishing or further malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/f0bdaf11fb208cce0fab76e56ec2fa00/2881317788.pdf In PDF document text
- http://beiks.info/public/file/9303047766.pdfIn PDF document text
- http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1607fdf4b126d7---4375711895.pdfIn PDF document text
- http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16086d6e845636---wosusugowutotefijaluwoso.pdfIn PDF document text
- https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/e938060e771079faf287f3b926fdadec/11993869240.pdfIn PDF document text
- https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/q9l4ah4t8usjoubrdkj5godrb5/tesobojuweve.pdfIn PDF document text
- https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/a35b0d7214bfc6c6e13e280a014845c4/pasumemuforirase.pdfIn PDF document text
- http://nissanotogovap.com/uploads/images/files/50544904612.pdfIn PDF document text
- http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3064e17c9---nudoderodafidesidenage.pdfIn PDF document text
- https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/e54c3123d25c6baa61e4da0492195728/doniviribinag.pdfIn PDF document text
- http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/3v276hbh8196e5kqlqopifm5q6/52742898624.pdfIn PDF document text
- https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/64e2f63af5041df8eb8a2801ee990249/mewuxewiporutur.pdfIn PDF document text
- https://rybczewice.pl/userfiles/file/22027000154.pdfIn PDF document text
- https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/fqc4of7535of7mvgg1e8a69nd4/razovewanopex.pdfIn PDF document text
- http://dxline.eu/userfiles/file/wepotusimujibebawed.pdfIn PDF document text
- http://ohadalegistrocbarter.com/ckeditor/uploads/files/runuzogisazizubo.pdfIn PDF document text
- https://a-1commercialkitchenservices.com/ckfinder/userfiles/files/vizegipaponawomako.pdfIn PDF document text
- http://ajtoablakcentrum.com/_user/file/86736634586.pdfIn PDF document text
- http://classiccar-jp.com/js/upload/files/ganabi.pdfIn PDF document text
- http://birdwatching.sk/media/file/47463156572.pdfIn PDF document text
- https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd9aa933aa---wumevepuz.pdfIn PDF document text
- https://sbsoftware.ro/admin/userfiles/file/49625352309.pdfIn PDF document text
- http://avstralianature.ru/ckfinder/userfiles/files/lirun.pdfIn PDF document text
- http://sarljarry.fr/userfiles/file/duvogowimubu.pdfIn PDF document text
- http://cherishedmomentphotos.com/clients/8/84/84fe84b553acfcd191e166b7401b6f02/File/89920648254.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=importance+of+primary+data+collection+pdfPDF 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_off0000c7af.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC7AF	10676 bytes
SHA-256: `f1eef8587e9187d2d328dbbaf9c96d8003498af8ca033aef71512414ec9a390d`
`font_01_sfnt_off0000e01b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE01B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000f82d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF82D	16076 bytes
SHA-256: `97f9dfd4502cfbb5b0e114077e414bcbb393dd600249cbb1c18687950a41921c`

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