PDF malware analysis — malicious · 8a8d51b5f4a6f0c6

MALICIOUS

PDF

79.0 KB Created: 2021-07-19 08:56:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: dff25701f5748a3c75d150201c05edd8 SHA-1: 015a5dc4ae08d16b6162a82e9f557cdf440b3e95 SHA-256: 8a8d51b5f4a6f0c6971cde1407b82f266e3d9dcf0e1cfa5b6219ad85b7fb0407

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads, likely intended to lure users to malicious sites. The presence of these links and the overall structure suggest an attempt to exploit user trust, potentially leading to further compromise.

Machine Learning

Nyx PDF Classifier malicious score 0.5097

Heuristics 5

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
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://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ad4bd6751---miduzu.pdf In PDF document text
- https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e63f96d5b59---71007609772.pdfIn PDF document text
- http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b3cffe8efec---48793886664.pdfIn PDF document text
- http://aiken7050.com/clients/5/51/510ae66c864a6d23552e02d1b5190e2c/File/67664985385.pdfIn PDF document text
- https://dotcomtravelegypt.com/userfiles/files/70319584660.pdfIn PDF document text
- https://fishboat.hr/files/43369701949.pdfIn PDF document text
- http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/anrkddfk275mebvdnani9rms5f/95706413742.pdfIn PDF document text
- https://www.piramideidiomas.com/ckfinder/userfiles/files/gobobebajunitusagivo.pdfIn PDF document text
- http://shinex-auto.com/userfiles/file/kusasujotalazexola.pdfIn PDF document text
- http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/akiku57pd4nohsvhhr00c4ho56/66408151881.pdfIn PDF document text
- https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/8329apjf2e9kq9s643612k7hrf/gizobadapo.pdfIn PDF document text
- http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607898c425126---zatojavijijofe.pdfIn PDF document text
- https://almudenafernandez.co/ckfinder/userfiles/Files/sirusaw.pdfIn PDF document text
- http://backupcenters.com/userfiles/file/witoluge.pdfIn PDF document text
- https://delphin-restaurant.com/ckfinder/upload/files/xanotu.pdfIn PDF document text
- http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088d8ba9f4e9---48098071656.pdfIn PDF document text
- https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088246ce7eaa---92424164635.pdfIn PDF document text
- https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/3pjnrnt2o2dvdfb410g90qa5bb/12368875475.pdfIn PDF document text
- https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/25e6574ddb2af3c5d55fd72242be19f9/42952043862.pdfIn PDF document text
- https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/40uh83j7mfk75aamgha7shlgu2/koxupisufavike.pdfIn PDF document text
- https://immo-cjeanpaul.lu/userfiles/files/9663838269.pdfIn PDF document text
- http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4b6cfeded8---45898982956.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=a+super+disintegrant+in+tablet+formulation+isPDF link annotation
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000efd2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFD2	11060 bytes
SHA-256: `7317a5b160bd1b2a56fb8e5b9fbcb8ed8a0c929f298bfa6c52b9cf196808f691`
`font_01_sfnt_off00010924.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10924	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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