MALICIOUS
134
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. It utilizes a link farm strategy, presenting itself as a free download for calculus textbooks to entice users to click on external URLs hosted on disposable domains. The presence of embedded URLs and the heuristic indicating a link farm on disposable hosting strongly suggest a malicious workflow designed to redirect users to potentially harmful content.
Machine Learning
- Nyx PDF Classifier malicious score 0.9996
Heuristics 6
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ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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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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Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTONDocument contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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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://pelibifir.ru/strik?utm_term=calculus+swokowski+pdf+free+download PDF link annotation
- http://wegolurubakisud.22web.org/how_to_pray_the_rosary_prayer_cards.pdfIn PDF document text
- http://lishop.site/dasar_mekanika_tanah4jxgd.pdfIn PDF document text
- http://detonic-ro.website/sixenimilipavawafevegrgw5.pdfIn PDF document text
- http://vsedlyatebya.xyz/9787687254kkz25.pdfIn PDF document text
- http://airbin.top/the_cop_and_the_anthem_full_text4pf33.pdfIn PDF document text
- http://3bki.ru/zewiwimodifejamujiburio87c0.pdfIn PDF document text
- http://zathkatow.xyz/fipoxiparikiid0c8.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://uploads.strikinglycdn.com/files/96ca78cc-e59f-4b54-bf5e-e8b0128405fe/how_to_use_mods_skyrim_xbox_one.pdfIn PDF document text
- http://zovitox.epizy.com/journey_through_anglo_american_literature.pdfIn PDF document text
- https://89d9876f-4e47-4433-ab5b-8da47ae3ae5c.filesusr.com/ugd/37c326_1e26ccbb8406441aa1fcd59b1e9a470d.pdf?index=trueIn PDF document text
- http://xabazuwodumodo.epizy.com/gymnopedie_no_3_erik_satie_sheet_music.pdfIn PDF document text
- http://vivirimivu.epizy.com/how_much_steel_does_canada_export_to_the_us.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/214e1363-6b54-4736-a9d6-655acf854aa5/tebamavizupilogazajukomif.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/fb5baafc-3905-4d95-b04b-ab2af8fe562d/9669275056.pdfIn PDF document text
- http://pevibije.rf.gd/insinkerator_badger_100_clogged.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/751af8cc-279a-496b-88c6-e8e6d39dcc17/vezuzeveb.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/bfa17f81-882c-446f-93ab-48ed2d216e8b/how_much_do_arson_investigators_make.pdfIn PDF document text
- https://254a6a59-343e-4b7e-907c-c4819e171fff.filesusr.com/ugd/decf6f_17da798c36054746a0a36af6577f93f6.pdf?index=trueIn PDF document text
- http://remobufu.rf.gd/best_3d_wallpapers_for_android_phones.pdfIn PDF document text
- http://mopezuvo.epizy.com/icsee_user_manual.pdfIn PDF document text
- https://dce579ed-4708-43c3-aaeb-2c76a6268d78.filesusr.com/ugd/944939_f82dd1e0f5f5481287e8f450e3702692.pdf?index=trueIn 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 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000d208.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD208 | 5132 bytes |
SHA-256: 062639b7c02a1c4187058b6cd268b0688275b435aae0cfbc89369b3b7885f619 |
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font_01_sfnt_off0000e396.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE396 | 10480 bytes |
SHA-256: 89f56ba6da02510cbcbdb9671934371499df2f3e2b1cd19595ebf9989c66d091 |
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font_02_sfnt_off0001073b.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1073B | 4324 bytes |
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c |
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