PDF malware analysis — malicious · b3f61cd9ac9b73f6

MALICIOUS

PDF

79.3 KB Created: 2021-09-09 16:31:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 5e787afba5ae22def0dd791a9eb4accd SHA-1: 14a1182c73d21bb2bf82286d775de453caf6ea04 SHA-256: b3f61cd9ac9b73f60f6f0ea613228a2a747eeb97e8eb2c00d503ab9cfe59a6ae

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

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 http://ranch.pl/files/file/13967266047.pdf In PDF document text
- https://suativisamsungtaihanoi.net/upload/files/metinejiroved.pdfIn PDF document text
- http://grandioso.asia/editor_upload_image/file/80370520955.pdfIn PDF document text
- https://trompis-tondschungel.de/userfiles/file/89685575589.pdfIn PDF document text
- http://www.egavilanes.com/ckfinder/userfiles/files/penelu.pdfIn PDF document text
- http://virus-safe-zone.com/ckupload/files/nopogazevaxizoxobewolaji.pdfIn PDF document text
- https://tutorlookup.com/ckeditor/ckfinder/userfiles/files/xitagisegogudutexezemazo.pdfIn PDF document text
- http://agenziaimmobiliarecannavo.eu/userfiles/files/65659081979.pdfIn PDF document text
- http://trustycctv.com/ckfinder/userfiles/files/39024402383.pdfIn PDF document text
- http://yummyschool.com/_UploadFile/Images/file/jotozomezux.pdfIn PDF document text
- https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/ce6858c1323c8ee928e968a6dc12461e/3579794646.pdfIn PDF document text
- https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139ce7317aab---18779451608.pdfIn PDF document text
- http://hamzalegalservices.com/userfiles/file/95933537730.pdfIn PDF document text
- http://www.physedu.in/newsite/userfiles/files/worikuwapaxugubure.pdfIn PDF document text
- http://immopolignano.lu/images/lavidojatu.pdfIn PDF document text
- http://timavoshipsupply.it/userfiles/file/65111242469.pdfIn PDF document text
- http://goldnumber.info/userfiles/file/lujuz.pdfIn PDF document text
- http://mundialimportweb.com/userfiles/file/85736891255.pdfIn PDF document text
- http://www.kowel.com/ckfinder/userfiles/files/1630673556.pdfIn PDF document text
- https://www.kuwaitpolyurethane.com/ckfinder/userfiles/files/17178043095.pdfIn PDF document text
- https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/xijapel.pdfIn PDF document text
- https://clickbox.ro/images/file/wivusebavi.pdfIn PDF document text
- http://jongauger.com/userfiles/file/43987267697.pdfIn PDF document text
- http://hyundaidongdo3s.com/images/files/xapisobitufinufezez.pdfIn PDF document text
- https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/4c9e2dd9bdb000888bb8238bca44868b/27113957012.pdfIn PDF document text
- https://jcmimoveis.com/userfiles/file/27194571320.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=old+windows+movie+maker+downloadPDF 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_off0000d577.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD577	16168 bytes
SHA-256: `117764e47c55c5232c21bea43e0118e341b66b02b117363025819d64b39765d4`
`font_01_sfnt_off0000ff24.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFF24	10580 bytes
SHA-256: `45b67f6ee5abc2dc869208f755e407a93a9b7b90cb3db48b96665e236310f03a`
`font_02_sfnt_off0001174b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1174B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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