MALICIOUS
126
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document body, though heavily obfuscated, contains text related to writing a certificate application, suggesting a lure. The presence of numerous external URIs, including one pointing to 'infrive.ru', indicates an attempt to redirect the user to potentially malicious websites for phishing or further exploitation.
Machine Learning
- Nyx PDF Classifier malicious score 0.9998
Heuristics 5
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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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARMSmall 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.
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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://infrive.ru/pbw?utm_term=how+to+write+unmarried+certificate+application PDF link annotation
- https://cdn-cms.f-static.net/uploads/4414167/normal_600d24a626588.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4381544/normal_5feee728df374.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369495/normal_604e36f07edd8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4385421/normal_6041d9b84aa33.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4416501/normal_60414147e2b24.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4390381/normal_60256d76ec2c6.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://lakiluxodev.pbworks.com/w/file/fetch/144567432/lijexuzag.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c82f61f1-4140-4a60-960c-ac72862179f7/pukefuloleronuwutozureti.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/650feadb-6a5b-4738-9e6d-2e6003a82fe8/remastered_vs_original.pdfIn PDF document text
- http://damopijos.pbworks.com/f/36310020448.pdfIn PDF document text
- http://wisarazed.pbworks.com/w/file/fetch/144462930/lightroom_classic_cc_tutorials_for_beginners.pdfIn PDF document text
- http://dimutojopog.pbworks.com/w/file/fetch/144444396/when_can_we_listen_to_lalitha_sahasranamam.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3f1a7777-2ee1-490a-94c7-bd3351034412/what_is_intellisense_blood_pressure_monitor.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2c4eaeee-b8ce-4efd-b942-8078b19a3d18/unit_6_the_great_depression_and_new_deal_test.pdfIn PDF document text
- http://pojaweku.pbworks.com/f/gun_mayhem_redux_unblocked_games_66.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3bb025fd-ed6b-4fa2-a7ac-d835c44d07a4/information_technology_def_english.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/05730673-de67-44b1-b28a-41c39e3e3309/brother_se_270d_manual.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/00ef8310-64cd-4121-be2e-903942c52a96/97615471453.pdfIn PDF document text
- http://gemometis.pbworks.com/w/file/fetch/144520977/64644473347.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e7efe95a-1dc4-4a83-b5cf-224576986451/xibewiwurarimexi.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_off00011f53.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11F53 | 5176 bytes |
SHA-256: 743fde5865f2edcd2880979da5d39ba0226e978a9a58fd8b38a9f0a6e205e7b3 |
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font_01_sfnt_off000130e8.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x130E8 | 11444 bytes |
SHA-256: e1d2ec3ec67a112d1b35a42683bb6e7dd2fbb5ed45509e6d77bc5901c785ff2b |
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