MALICIOUS
126
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, with a primary one pointing to 'infrive.ru', suggesting a phishing or malware distribution lure disguised as a worksheet answer key. The presence of embedded URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic further support the conclusion that this document is designed to redirect users to potentially harmful websites.
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=lab+equipment+practice+worksheet+answer+key PDF link annotation
- https://xesisezedowajax.weebly.com/uploads/1/3/4/7/134729639/3343186.pdfIn PDF document text
- https://tenaxegib.weebly.com/uploads/1/3/4/5/134583113/luwudolole.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4454182/normal_600a12ac22381.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4469638/normal_5fe611565aa38.pdfIn PDF document text
- https://xagigerabep.weebly.com/uploads/1/3/1/4/131483632/buvewavisawiruf.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://sizolasipape.pbworks.com/f/voteredosusipotil.pdfIn PDF document text
- http://gitixofipoxu.pbworks.com/w/file/fetch/144537360/call_of_duty_modern_warfare_hacks_ps4.pdfIn PDF document text
- http://lijegazoz.pbworks.com/f/cost_to_replace_flame_sensor_on_furnace.pdfIn PDF document text
- http://felefejimax.pbworks.com/w/file/fetch/144580704/62236926978.pdfIn PDF document text
- http://lerepaxa.pbworks.com/w/file/fetch/144585174/baxoz.pdfIn PDF document text
- http://junerew.pbworks.com/f/92812795516.pdfIn PDF document text
- http://fokopaviwu.pbworks.com/w/file/fetch/144464247/81326468676.pdfIn PDF document text
- http://xifilipisi.pbworks.com/w/file/fetch/144413508/98317278947.pdfIn PDF document text
- http://vafobotigef.pbworks.com/f/gaxapinonajis.pdfIn PDF document text
- http://jajisaparev.pbworks.com/w/file/fetch/144418959/poliboloduwewonarodunozon.pdfIn PDF document text
- http://liwuvedesisu.pbworks.com/w/file/fetch/144528012/distributive_property_puzzle_worksheet.pdfIn PDF document text
- http://demopefo.pbworks.com/f/can_you_play_cards_against_humanity_with_3_players.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_off0000d18b.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD18B | 5608 bytes |
SHA-256: 6a95585c19aa1b9c57d3432bb2a64e4b8022d851af8027a922f4d4b5563c37a5 |
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font_01_sfnt_off0000e490.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE490 | 9936 bytes |
SHA-256: fa6afd7e0a415cc97f6929ea4f88da1559f74129804c01a577cd6b97faa7c117 |
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