MALICIOUS
186
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous external links, many of which are hosted on disposable domains. The primary URL, 'https://ponafet.ru/123?utm_term=curso+auditoria+de+sistemas+de+informa%25C3%25A7%25C3%25A3o', suggests a lure related to an 'auditing of information systems' course, likely a phishing pretext. No scripts were extracted, but the PDF structure and link farm behavior are indicative of a phishing or malware distribution campaign.
Machine Learning
- Nyx PDF Classifier malicious score 0.9997
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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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://ponafet.ru/123?utm_term=curso+auditoria+de+sistemas+de+informa%25C3%25A7%25C3%25A3o PDF link annotation
- https://votawaxamudogop.weebly.com/uploads/1/3/4/4/134400347/joduwexu-vaxudosi.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4423714/normal_5fdcb150b476d.pdfIn PDF document text
- https://vubufixul.weebly.com/uploads/1/3/4/7/134708570/3d600a81c.pdfIn PDF document text
- https://dazarurizupe.weebly.com/uploads/1/3/1/1/131164120/1420018.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4412763/normal_601bb4201bb1f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4390382/normal_600a263e6a683.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379240/normal_604854aa65a2e.pdfIn PDF document text
- https://rijumiwotoresu.weebly.com/uploads/1/3/4/4/134490354/45090d9f70e1.pdfIn PDF document text
- https://gatilavim.weebly.com/uploads/1/3/4/3/134391542/8051926.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4413454/normal_60451418ce38d.pdfIn PDF document text
- https://vamexerop.weebly.com/uploads/1/3/6/0/136085595/folamog_suruxebuki.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4420239/normal_5ffea3add13aa.pdfIn PDF document text
- https://pezasagizagifoj.weebly.com/uploads/1/3/5/9/135968908/9f717066b5a324f.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
- http://najapenoz.pbworks.com/f/que_es_mi_padre_espiritual.pdfIn PDF document text
- http://larabefejaji.pbworks.com/w/file/fetch/144555741/how_to_service_panasonic_inverter_air_conditioner.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0caddb3d-b33f-4341-91af-b90eadd2236f/dajebimopudev.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/100a0b57-ac8b-4562-9cf2-922ab6330a29/how_to_check_day_trades_webull.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/050baa16-95f2-4ccb-91ad-35c683db9d0e/royal_mail_international_postage_zones.pdfIn PDF document text
- http://niwomif.pbworks.com/w/file/fetch/144426015/47374330852.pdfIn PDF document text
- http://jizakatum.pbworks.com/w/file/fetch/144614652/67673910908.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 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000e171.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE171 | 5424 bytes |
SHA-256: b1166052b52d8eee51e395e33614112a14e3bfc3e800a53266e75bf5a384e220 |
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font_01_sfnt_off0000f337.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF337 | 12684 bytes |
SHA-256: 9efa4bce3623f5e1b151fd3dc398026dee4d53ccb7f9937752d8d1101c09c6f1 |
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font_02_sfnt_off00011978.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11978 | 4324 bytes |
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2 |
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