MALICIOUS
224
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
T1203 Exploitation for Client Execution
The PDF contains multiple embedded URLs, with at least one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'Pharmacotherapy casebook answers', suggesting a phishing or malware distribution attempt. The presence of 'curl_form.pdf' in the document text hints at potential command execution or download capabilities.
Machine Learning
- Nyx PDF Classifier malicious score 0.9998
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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PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINKPDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMANDExtracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
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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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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://dafemum.ru/strik?utm_term=pharmacotherapy+casebook+answers In PDF document text
- https://cdn.sqhk.co/jibenapola/hbgjGiT/flying_car_robot_3d_game.pdfIn PDF document text
- http://xuritepizib.mygamesonline.org/allport_1961.pdfIn PDF document text
- http://ruvogodozipabiv.scienceontheweb.net/tomotaxupulugibikameken.pdfIn PDF document text
- https://cdn.sqhk.co/rawuredilu/3Fgirym/incline_dumbbell_curl_form.pdfIn PDF document text
- http://wejowadizabudex.mypressonline.com/65673325746.pdfIn macro / runtime command snippet
- https://cdn.sqhk.co/dilizilozok/giieHhe/13179176801.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://83d12552-0bc1-4415-b221-1da25caacb9b.filesusr.com/ugd/1e11d0_e48416f7d7e140ccb93de91426aad21c.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/2878414a-5527-490f-b204-d75956c85029/coldest_city_in_the_usa_today.pdfIn PDF document text
- https://s3.amazonaws.com/punurum/26016936480.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5f79bb0e-24d4-4cbc-b43e-be80725fae9b/4489886893.pdfIn PDF document text
- https://s3.amazonaws.com/fikuvine/jopukalubanaduli.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/946cb68c-5c39-4871-9b6f-39c7e62daa93/katerovaporilex.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3393131d-65a4-4e68-a967-0996ebed3578/89199018797.pdfIn PDF document text
- https://s3.amazonaws.com/gazitif/bhojpuri_chaita_video_mp4.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5ea1bbf7-b628-4bf1-80a4-37edc79e526a/jokimo.pdfIn PDF document text
- https://s3.amazonaws.com/tumuzu/metiga.pdfIn macro / runtime command snippet
- https://8316a071-1c81-4729-bbc9-bb84f51c1359.filesusr.com/ugd/b2ba6b_8fa0955427df4649bd62fd77cf6a9e34.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/tinivukedeta/kelpy_g_sheet_music_clarinet.pdfIn PDF document text
- https://s3.amazonaws.com/daraniwekamidir/bride_of_the_century_episode_10.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
- https://uploads.strikinglycdn.com/files/5ea1bbIn macro / runtime command snippet
- 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_off0000cb5c.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCB5C | 5540 bytes |
SHA-256: 68c739c7be11a3504a0660ce72449a0f357219bd47da61e2ece062c8e51abf6e |
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font_01_sfnt_off0000de1b.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDE1B | 9968 bytes |
SHA-256: 3a90562f3f8d82cddb71a60eeff8af9f16e8ad68ae3f4249c41c9dcbe9f8a1bf |
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