PDF malware analysis — malicious · 9096a7e18b331baa

MALICIOUS

PDF

70.9 KB Created: 2021-10-03 05:56:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02

MD5: 5f7c897acf97d9aee6b461aa24f814c8 SHA-1: c2959575366d7f3b9135d995b4d8b18f3c34f074 SHA-256: 9096a7e18b331baa83191730dc814c1401f7b72c2bcf1a1197eed668276b35da

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS uploads or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure and numerous external links are consistent with a tactic to redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9993

Heuristics 6

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
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://physocare.com/Images_upload/files/rikibowalugav.pdf In PDF document text
- http://usaoxin.com/userfiles/2021-9/file/99585356053.pdfIn PDF document text
- http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/16144fe8dd8bf6---33342828078.pdfIn PDF document text
- https://satuldelut.ro/ckfinder/userfiles/files/33529330865.pdfIn PDF document text
- https://directorvincentchow.com/fck_filemanager_upload/file/74408229921.pdfIn PDF document text
- https://guadix.co/ckfinder/userfiles/files/benomomosuzixibozaturege.pdfIn PDF document text
- http://patriabrno.cz/userfiles/files/26462373935.pdfIn PDF document text
- http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139051a4348f---74944107143.pdfIn PDF document text
- https://weyergans-hcc.lv/userfiles/file/93776904292.pdfIn PDF document text
- https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613af3d4de918---fusejapalixejeda.pdfIn PDF document text
- http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134319485a2b---kajifofefakukulelavibaf.pdfIn PDF document text
- http://timnhanhonline.com/upload/files/fufafulawe.pdfIn PDF document text
- https://goldfieldssanddrags.com.au/ckfinder/userfiles/files/67770605150.pdfIn PDF document text
- https://hsse.cl/files/76825293190.pdfIn PDF document text
- https://atpl.aero/ckfinder/userfiles/files/18854974017.pdfIn PDF document text
- http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614386d241cc2---dowozolaz.pdfIn PDF document text
- https://sopkambing.com/contents/files/92790025479.pdfIn PDF document text
- http://fszhenjia.com/upfolder/e/files/20210909125909.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=die+young+lyrics+the+band+perryPDF 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_off0000acf0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xACF0	11148 bytes
SHA-256: `3b1a9d55fb28b2946ee7182b545bc1fa8855349a92bdb0c949a099f06856453c`
`font_01_sfnt_off0000c687.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC687	19084 bytes
SHA-256: `6801111157a2c1608cb3122a8d1ba36fcc398d670285cd2021158ee68ef62a85`
`font_02_sfnt_off0000f69e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF69E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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