PDF malware analysis — malicious · 2278efd5270728cd

MALICIOUS

PDF

58.6 KB Created: 2021-02-28 05:07:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22

MD5: 4233cfdf48f73fb109299944abaafef9 SHA-1: c847a4e4697bab1785aa01080061835259e4e8b7 SHA-256: 2278efd5270728cd0ae56145e370fca3b9bc51f4cb54b2f6f31e7b3c825a726d

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.7380

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
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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 https://soxebez.ru/aws?utm_term=intermediate+algebra+problems+aops PDF link annotation
- https://cdn-cms.f-static.net/uploads/4448113/normal_602c741ca7c83.pdfIn PDF document text
- https://cdn.sqhk.co/maxevurux/hajblSB/25467048009.pdfIn PDF document text
- http://myyshooop224.site/sigawilumexovajodabubnqed5.pdfIn PDF document text
- http://heleogose.online/what_does_call_to_action_mean_in_a_speechjhl9q.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4377928/normal_5ffb7a806f6ca.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369933/normal_6037c0234d7ce.pdfIn PDF document text
- https://tokoposejod.weebly.com/uploads/1/3/1/3/131380771/9bed3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4466146/normal_60340a09d298a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4376101/normal_5fd7dcd0cbd60.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4420776/normal_60006bbb735ef.pdfIn PDF document text
- http://cozyplacefor.rest/nujozorezexipedujetxiynz.pdfIn PDF document text
- https://cdn.sqhk.co/pemenixa/bihjd1Z/quest_diagnostics_portal_360.pdfIn PDF document text
- http://alifan.store/solicitud_printaform9xur7.pdfIn PDF document text
- https://cdn.sqhk.co/xakutofi/ciggfNb/toon_blast_champions_league_stage_13.pdfIn PDF document text
- https://cdn.sqhk.co/baxilutifi/iiehiji/hp_smart_app_download_windows_10_without_store.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4502870/normal_5fea39a0dfafd.pdfIn PDF document text
- https://cdn.sqhk.co/zimopaji/eEbgdvj/47936878501.pdfIn PDF document text
- https://ladunibik.weebly.com/uploads/1/3/4/0/134096621/bf2e041326.pdfIn PDF document text

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