MALICIOUS
196
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
This PDF file exhibits characteristics of a phishing lure, leveraging SEO tactics to attract victims interested in programming resources. It contains a mass of external links, many of which point to other PDFs, suggesting a link farm or redirector strategy. The presence of the URL 'https://midufefew.ru/123?utm_term=algorithms+in+cpp+pdf' and numerous other PDF links indicates a likely attempt to distribute malicious content or phish for credentials under the guise of providing valuable documents. The ML classifier and ClamAV detection strongly support its malicious nature.
Machine Learning
- Nyx PDF Classifier malicious score 0.9992
Heuristics 6
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ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARMSmall 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.
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Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINKPDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
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External URI info PDF_URIPDF contains an external URL action
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Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTALThe 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.
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Embedded URL info EMBEDDED_URLOne 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://midufefew.ru/123?utm_term=algorithms+in+cpp+pdf PDF link annotation
- https://static.s123-cdn-static.com/uploads/4446398/normal_5ff38072c5444.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4402956/normal_5fd6197a50571.pdfIn PDF document text
- https://cdn.sqhk.co/giwegulatil/fnjiO01/mataxubofes.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4506131/normal_5fe278b126ff7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4453102/normal_6036dc39a624b.pdfIn PDF document text
- https://cdn.sqhk.co/tirewaku/omheDaz/pirixulodajofojew.pdfIn PDF document text
- https://zavutotarewif.weebly.com/uploads/1/3/1/3/131379951/4216534.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4504554/normal_5fee3a6ec7427.pdfIn PDF document text
- https://cdn.sqhk.co/jeporikate/gadXdgi/video_call_chuck_e_cheese_s_live_online.pdfIn PDF document text
- https://nebomigefut.weebly.com/uploads/1/3/4/3/134359696/7721285.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4500446/normal_5fcce0d9d29f8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4463034/normal_5fd173126633c.pdfIn PDF document text
- https://cdn.sqhk.co/vegedusovo/azOid0z/33729415151.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4447278/normal_603eecdd84cc4.pdfIn PDF document text
- https://cdn.sqhk.co/lokijuzim/fjdhijc/27104445427.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4465393/normal_5fd17f1d2539e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4421623/normal_5fd7c3c30d267.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4505125/normal_606aa78122556.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4452385/normal_601ad1b0a83e7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4502511/normal_6066b1992cd65.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/dc3ea0e6-33ab-4b6a-8017-eced5ce92042/37789793817.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d7095ce8-ccff-49db-a22d-3ee76335ef06/72186391282.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3020c5be-b9df-4d7d-9559-715ad1888a4d/introduccion_al_estudio_del_trabajo_oit_limusa.pdfIn PDF document text
- 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://scripts.sil.org/OFLIn PDF document text
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000e892.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE892 | 5348 bytes |
SHA-256: 67c3603cdd05186a6675856fef0ae1e03ec8c51a048ffa7f8d61ac1d0855e245 |
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font_01_sfnt_off0000faa5.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFAA5 | 11024 bytes |
SHA-256: dabc362b43c13ca8034def4044765c911f0038a26b9dde7a0c8d1ad9f217297c |
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