PDF malware analysis — malicious · 6555bf553424d99d

MALICIOUS

PDF

78.4 KB Created: 2021-09-03 15:16:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 3764d5ffabca486b5a7e923ce0a1f262 SHA-1: 2203c183349430a56c41c2110b01471c6c56dd0e SHA-256: 6555bf553424d99d93b0e723de1501a8d2a08ea176af672cbd85d3ad14b4178d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links, many pointing to compromised CMS upload storage and disposable hosting, characteristic of a link farm designed to obscure the final destination. These links likely serve as a lure to trick users into visiting malicious sites, potentially for phishing or to download further malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9844

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 https://sharmtocairo.com/userfiles/files/54175620964.pdf In PDF document text
- https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8e450f896---34831765576.pdfIn PDF document text
- http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089ad1bbe2f5---bufikokigesijapivus.pdfIn PDF document text
- http://thepnguyentran.com/media/ftp/file/zizigazotipiduzezewo.pdfIn PDF document text
- http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16113ae65252dc---34919038696.pdfIn PDF document text
- http://dh-cell.net/ckfinder/userfiles/files/29899036013.pdfIn PDF document text
- https://bostoncake888.com/UserFiles/files/romosub.pdfIn PDF document text
- https://barcelonamedicalcenter.com/files/galeria/files/9412778040.pdfIn PDF document text
- https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/1792348cb5c54cd61fcc41b4a3d57952/81336063907.pdfIn PDF document text
- https://forumhrdbekasi.com/webroot/userfiles/files/77102284549.pdfIn PDF document text
- https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/5450647e234c7506938f9d5e89cf8685/ganuravifove.pdfIn PDF document text
- https://tungqibiotech.com/upfiles/editor/files/detesirejetolijevudaxor.pdfIn PDF document text
- http://roughriders66.com/clients/f/fa/fa96273273f04fd2a06feef12b1e4d70/File/xaligur.pdfIn PDF document text
- https://pilisilovaskert.hu/ckfinder/userfiles/files/53458251704.pdfIn PDF document text
- https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/1392775560ef0d165877fa34a68851c0/lafebozi.pdfIn PDF document text
- https://atcotourismtravel.com/userfiles/file/xivevibajefokotiziz.pdfIn PDF document text
- http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f45f3f29da---wafajimege.pdfIn PDF document text
- http://lagunaapartman.hu/images/user/file/71269280919.pdfIn PDF document text
- https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/202f3085320cf2ec299c3e5b11cbf518/59601668047.pdfIn PDF document text
- http://hoanhaochemical.com/uploads/files/jipijezipimize.pdfIn PDF document text
- https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073a2701c7e9---sipodetokukapixet.pdfIn PDF document text
- http://szerecsen.hu/editor_up/8855582714.pdfIn PDF document text
- https://asset-books.com/userfiles/file/27333330101.pdfIn PDF document text
- https://alrukn.co/userfiles/files/togisezokibadivabajuf.pdfIn PDF document text
- https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ada91cf77---7174718245.pdfIn PDF document text
- https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f3552107262---27422804526.pdfIn PDF document text
- http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075c2e075b37---44348907043.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=air+brakes+test+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_off0000d133.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD133	10436 bytes
SHA-256: `172c1663bf8c7a4b14620c20bba52552aebce0a61bce4e8cc6607914a3a4f8f9`
`font_01_sfnt_off0000e8d7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8D7	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000100e9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x100E9	16920 bytes
SHA-256: `c9f6d074e1d83f3cc3268e37dd333f9e159be39e131d91367f6d21188b3de2e1`

Open this report in the interactive analyzer, or submit your own file for analysis.